content: /*
   * Copyright (c) 2005, 2021, Oracle and/or its affiliates. All rights reserved.
   * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   *
   * This code is free software; you can redistribute it and/or modify it
   * under the terms of the GNU General Public License version 2 only, as
   * published by the Free Software Foundation.  Oracle designates this
   * particular file as subject to the "Classpath" exception as provided
   * by Oracle in the LICENSE file that accompanied this code.
   *
   * This code is distributed in the hope that it will be useful, but WITHOUT
   * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
   * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
   * version 2 for more details (a copy is included in the LICENSE file that
   * accompanied this code).
   *
   * You should have received a copy of the GNU General Public License version
   * 2 along with this work; if not, write to the Free Software Foundation,
   * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
   *
   * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
   * or visit www.oracle.com if you need additional information or have any
   * questions.
   */
  
  package openjdk.source.util;
  
  import openjdk.source.tree.*;
  import javac.internal.PreviewFeature;
  
  /**
   * A simple visitor for tree nodes.
   *
   * @param <R> the return type of this visitor's methods.  Use {@link
   *            Void} for visitors that do not need to return results.
   * @param <P> the type of the additional parameter to this visitor's
   *            methods.  Use {@code Void} for visitors that do not need an
   *            additional parameter.
   *
   * @author Peter von der Ah&eacute;
   * @since 1.6
   */
  public class SimpleTreeVisitor <R,P> implements TreeVisitor<R,P> {
      /**
       * The default value, returned by the {@link #defaultAction default action}.
       */
      protected final R DEFAULT_VALUE;
  
      /**
       * Creates a visitor, with a DEFAULT_VALUE of {@code null}.
       */
      protected SimpleTreeVisitor() {
          DEFAULT_VALUE = null;
      }
  
      /**
       * Creates a visitor, with a specified DEFAULT_VALUE.
       * @param defaultValue the default value to be returned by the default action
       */
      protected SimpleTreeVisitor(R defaultValue) {
          DEFAULT_VALUE = defaultValue;
      }
  
      /**
       * The default action, used by all visit methods that are not overridden.
       * @param node the node being visited
       * @param p the parameter value passed to the visit method
       * @return the result value to be returned from the visit method
       */
      protected R defaultAction(Tree node, P p) {
          return DEFAULT_VALUE;
      }
  
      /**
       * Invokes the appropriate visit method specific to the type of the node.
       * @param node the node on which to dispatch
       * @param p a parameter to be passed to the appropriate visit method
       * @return the value returns from the appropriate visit method
       */
      public final R visit(Tree node, P p) {
          return (node == null) ? null : node.accept(this, p);
      }
  
      /**
       * Invokes the appropriate visit method on each of a sequence of nodes.
       * @param nodes the nodes on which to dispatch
       * @param p a parameter value to be passed to each appropriate visit method
       * @return the value return from the last of the visit methods, or null
       *      if none were called
       */
      public final R visit(Iterable<? extends Tree> nodes, P p) {
          R r = null;
          if (nodes != null)
              for (Tree node : nodes)
                  r = visit(node, p);
          return r;
      }
  
      /**
       * {@inheritDoc}
       *
       * @implSpec This implementation calls {@code defaultAction}.
       *
       * @param node {@inheritDoc}
       * @param p {@inheritDoc}
       * @return  the result of {@code defaultAction}
       */
      @Override
      public R visitCompilationUnit(CompilationUnitTree node, P p) {
          return defaultAction(node, p);
      }
  
      /**
       * {@inheritDoc}
       *
       * @implSpec This implementation calls {@code defaultAction}.
       *
       * @param node {@inheritDoc}
       * @param p {@inheritDoc}
       * @return  the result of {@code defaultAction}
       */
      @Override
      public R visitPackage(PackageTree node, P p) {
          return defaultAction(node, p);
      }
  
      /**
       * {@inheritDoc}
       *
       * @implSpec This implementation calls {@code defaultAction}.
       *
       * @param node {@inheritDoc}
       * @param p {@inheritDoc}
       * @return  the result of {@code defaultAction}
       */
      @Override
      public R visitImport(ImportTree node, P p) {
          return defaultAction(node, p);
      }
  
      /**
       * {@inheritDoc}
       *
       * @implSpec This implementation calls {@code defaultAction}.
       *
       * @param node {@inheritDoc}
       * @param p {@inheritDoc}
       * @return  the result of {@code defaultAction}
       */
      @Override
      public R visitClass(ClassTree node, P p) {
          return defaultAction(node, p);
      }
  
      /**
       * {@inheritDoc}
       *
       * @implSpec This implementation calls {@code defaultAction}.
       *
       * @param node {@inheritDoc}
       * @param p {@inheritDoc}
       * @return  the result of {@code defaultAction}
       */
      @Override
      public R visitMethod(MethodTree node, P p) {
          return defaultAction(node, p);
      }
  
      /**
       * {@inheritDoc}
       *
       * @implSpec This implementation calls {@code defaultAction}.
       *
       * @param node {@inheritDoc}
       * @param p {@inheritDoc}
       * @return  the result of {@code defaultAction}
       */
      @Override
      public R visitVariable(VariableTree node, P p) {
          return defaultAction(node, p);
      }
  
      /**
       * {@inheritDoc}
       *
       * @implSpec This implementation calls {@code defaultAction}.
       *
       * @param node {@inheritDoc}
       * @param p {@inheritDoc}
       * @return  the result of {@code defaultAction}
       */
      @Override
      public R visitEmptyStatement(EmptyStatementTree node, P p) {
          return defaultAction(node, p);
      }
  
      /**
       * {@inheritDoc}
       *
       * @implSpec This implementation calls {@code defaultAction}.
       *
       * @param node {@inheritDoc}
       * @param p {@inheritDoc}
       * @return  the result of {@code defaultAction}
       */
      @Override
      public R visitBlock(BlockTree node, P p) {
          return defaultAction(node, p);
      }
  
      /**
       * {@inheritDoc}
       *
       * @implSpec This implementation calls {@code defaultAction}.
       *
       * @param node {@inheritDoc}
       * @param p {@inheritDoc}
       * @return  the result of {@code defaultAction}
       */
      @Override
      public R visitDoWhileLoop(DoWhileLoopTree node, P p) {
          return defaultAction(node, p);
      }
  
      /**
       * {@inheritDoc}
       *
       * @implSpec This implementation calls {@code defaultAction}.
       *
       * @param node {@inheritDoc}
       * @param p {@inheritDoc}
       * @return  the result of {@code defaultAction}
       */
      @Override
      public R visitWhileLoop(WhileLoopTree node, P p) {
          return defaultAction(node, p);
      }
  
      /**
       * {@inheritDoc}
       *
       * @implSpec This implementation calls {@code defaultAction}.
       *
       * @param node {@inheritDoc}
       * @param p {@inheritDoc}
       * @return  the result of {@code defaultAction}
       */
      @Override
      public R visitForLoop(ForLoopTree node, P p) {
          return defaultAction(node, p);
      }
  
      /**
       * {@inheritDoc}
       *
       * @implSpec This implementation calls {@code defaultAction}.
       *
       * @param node {@inheritDoc}
       * @param p {@inheritDoc}
       * @return  the result of {@code defaultAction}
       */
      @Override
      public R visitEnhancedForLoop(EnhancedForLoopTree node, P p) {
          return defaultAction(node, p);
      }
  
      /**
       * {@inheritDoc}
       *
       * @implSpec This implementation calls {@code defaultAction}.
       *
       * @param node {@inheritDoc}
       * @param p {@inheritDoc}
       * @return  the result of {@code defaultAction}
       */
      @Override
      public R visitLabeledStatement(LabeledStatementTree node, P p) {
          return defaultAction(node, p);
      }
  
      /**
       * {@inheritDoc}
       *
       * @implSpec This implementation calls {@code defaultAction}.
       *
       * @param node {@inheritDoc}
       * @param p {@inheritDoc}
       * @return  the result of {@code defaultAction}
       */
      @Override
      public R visitSwitch(SwitchTree node, P p) {
          return defaultAction(node, p);
      }
  
      /**
       * {@inheritDoc}
       *
       * @implSpec This implementation calls {@code defaultAction}.
       *
       * @param node {@inheritDoc}
       * @param p {@inheritDoc}
       * @return  the result of {@code defaultAction}
       */
      @Override
      public R visitSwitchExpression(SwitchExpressionTree node, P p) {
          return defaultAction(node, p);
      }
  
      /**
       * {@inheritDoc}
       *
       * @implSpec This implementation calls {@code defaultAction}.
       *
       * @param node {@inheritDoc}
       * @param p {@inheritDoc}
       * @return  the result of {@code defaultAction}
       */
      @Override
      public R visitCase(CaseTree node, P p) {
          return defaultAction(node, p);
      }
  
      /**
       * {@inheritDoc}
       *
       * @implSpec This implementation calls {@code defaultAction}.
       *
       * @param node {@inheritDoc}
       * @param p {@inheritDoc}
       * @return  the result of {@code defaultAction}
       */
      @Override
      public R visitSynchronized(SynchronizedTree node, P p) {
          return defaultAction(node, p);
      }
  
      /**
       * {@inheritDoc}
       *
       * @implSpec This implementation calls {@code defaultAction}.
       *
       * @param node {@inheritDoc}
       * @param p {@inheritDoc}
       * @return  the result of {@code defaultAction}
       */
      @Override
      public R visitTry(TryTree node, P p) {
          return defaultAction(node, p);
      }
  
      /**
       * {@inheritDoc}
       *
       * @implSpec This implementation calls {@code defaultAction}.
       *
       * @param node {@inheritDoc}
       * @param p {@inheritDoc}
       * @return  the result of {@code defaultAction}
       */
      @Override
      public R visitCatch(CatchTree node, P p) {
          return defaultAction(node, p);
      }
  
      /**
       * {@inheritDoc}
       *
       * @implSpec This implementation calls {@code defaultAction}.
       *
       * @param node {@inheritDoc}
       * @param p {@inheritDoc}
       * @return  the result of {@code defaultAction}
       */
      @Override
      public R visitConditionalExpression(ConditionalExpressionTree node, P p) {
          return defaultAction(node, p);
      }
  
      /**
       * {@inheritDoc}
       *
       * @implSpec This implementation calls {@code defaultAction}.
       *
       * @param node {@inheritDoc}
       * @param p {@inheritDoc}
       * @return  the result of {@code defaultAction}
       */
      @Override
      public R visitIf(IfTree node, P p) {
          return defaultAction(node, p);
      }
  
      /**
       * {@inheritDoc}
       *
       * @implSpec This implementation calls {@code defaultAction}.
       *
       * @param node {@inheritDoc}
       * @param p {@inheritDoc}
       * @return  the result of {@code defaultAction}
       */
      @Override
      public R visitExpressionStatement(ExpressionStatementTree node, P p) {
          return defaultAction(node, p);
      }
  
      /**
       * {@inheritDoc}
       *
       * @implSpec This implementation calls {@code defaultAction}.
       *
       * @param node {@inheritDoc}
       * @param p {@inheritDoc}
       * @return  the result of {@code defaultAction}
       */
      @Override
      public R visitBreak(BreakTree node, P p) {
          return defaultAction(node, p);
      }
  
      /**
       * {@inheritDoc}
       *
       * @implSpec This implementation calls {@code defaultAction}.
       *
       * @param node {@inheritDoc}
       * @param p {@inheritDoc}
       * @return  the result of {@code defaultAction}
       */
      @Override
      public R visitContinue(ContinueTree node, P p) {
          return defaultAction(node, p);
      }
  
      /**
       * {@inheritDoc}
       *
       * @implSpec This implementation calls {@code defaultAction}.
       *
       * @param node {@inheritDoc}
       * @param p {@inheritDoc}
       * @return  the result of {@code defaultAction}
       */
      @Override
      public R visitReturn(ReturnTree node, P p) {
          return defaultAction(node, p);
      }
  
      /**
       * {@inheritDoc}
       *
       * @implSpec This implementation calls {@code defaultAction}.
       *
       * @param node {@inheritDoc}
       * @param p {@inheritDoc}
       * @return  the result of {@code defaultAction}
       */
      @Override
      public R visitThrow(ThrowTree node, P p) {
          return defaultAction(node, p);
      }
  
      /**
       * {@inheritDoc}
       *
       * @implSpec This implementation calls {@code defaultAction}.
       *
       * @param node {@inheritDoc}
       * @param p {@inheritDoc}
       * @return  the result of {@code defaultAction}
       */
      @Override
      public R visitAssert(AssertTree node, P p) {
          return defaultAction(node, p);
      }
  
      /**
       * {@inheritDoc}
       *
       * @implSpec This implementation calls {@code defaultAction}.
       *
       * @param node {@inheritDoc}
       * @param p {@inheritDoc}
       * @return  the result of {@code defaultAction}
       */
      @Override
      public R visitMethodInvocation(MethodInvocationTree node, P p) {
          return defaultAction(node, p);
      }
  
      /**
       * {@inheritDoc}
       *
       * @implSpec This implementation calls {@code defaultAction}.
       *
       * @param node {@inheritDoc}
       * @param p {@inheritDoc}
       * @return  the result of {@code defaultAction}
       */
      @Override
      public R visitNewClass(NewClassTree node, P p) {
          return defaultAction(node, p);
      }
  
      /**
       * {@inheritDoc}
       *
       * @implSpec This implementation calls {@code defaultAction}.
       *
       * @param node {@inheritDoc}
       * @param p {@inheritDoc}
       * @return  the result of {@code defaultAction}
       */
      @Override
      public R visitNewArray(NewArrayTree node, P p) {
          return defaultAction(node, p);
      }
  
      /**
       * {@inheritDoc}
       *
       * @implSpec This implementation calls {@code defaultAction}.
       *
       * @param node {@inheritDoc}
       * @param p {@inheritDoc}
       * @return  the result of {@code defaultAction}
       */
      @Override
      public R visitLambdaExpression(LambdaExpressionTree node, P p) {
          return defaultAction(node, p);
      }
  
      /**
       * {@inheritDoc}
       *
       * @implSpec This implementation calls {@code defaultAction}.
       *
       * @param node {@inheritDoc}
       * @param p {@inheritDoc}
       * @return  the result of {@code defaultAction}
       */
      @Override
      public R visitParenthesized(ParenthesizedTree node, P p) {
          return defaultAction(node, p);
      }
  
      /**
       * {@inheritDoc}
       *
       * @implSpec This implementation calls {@code defaultAction}.
       *
       * @param node {@inheritDoc}
       * @param p {@inheritDoc}
       * @return  the result of {@code defaultAction}
       */
      @Override
      public R visitAssignment(AssignmentTree node, P p) {
          return defaultAction(node, p);
      }
  
      /**
       * {@inheritDoc}
       *
       * @implSpec This implementation calls {@code defaultAction}.
       *
       * @param node {@inheritDoc}
       * @param p {@inheritDoc}
       * @return  the result of {@code defaultAction}
       */
      @Override
      public R visitCompoundAssignment(CompoundAssignmentTree node, P p) {
          return defaultAction(node, p);
      }
  
      /**
       * {@inheritDoc}
       *
       * @implSpec This implementation calls {@code defaultAction}.
       *
       * @param node {@inheritDoc}
       * @param p {@inheritDoc}
       * @return  the result of {@code defaultAction}
       */
      @Override
      public R visitUnary(UnaryTree node, P p) {
          return defaultAction(node, p);
      }
  
      /**
       * {@inheritDoc}
       *
       * @implSpec This implementation calls {@code defaultAction}.
       *
       * @param node {@inheritDoc}
       * @param p {@inheritDoc}
       * @return  the result of {@code defaultAction}
       */
      @Override
      public R visitBinary(BinaryTree node, P p) {
          return defaultAction(node, p);
      }
  
      /**
       * {@inheritDoc}
       *
       * @implSpec This implementation calls {@code defaultAction}.
       *
       * @param node {@inheritDoc}
       * @param p {@inheritDoc}
       * @return  the result of {@code defaultAction}
       */
      @Override
      public R visitTypeCast(TypeCastTree node, P p) {
          return defaultAction(node, p);
      }
  
      /**
       * {@inheritDoc}
       *
       * @implSpec This implementation calls {@code defaultAction}.
       *
       * @param node {@inheritDoc}
       * @param p {@inheritDoc}
       * @return  the result of {@code defaultAction}
       */
      @Override
      public R visitInstanceOf(InstanceOfTree node, P p) {
          return defaultAction(node, p);
      }
  
      /**
       * {@inheritDoc}
       *
       * @implSpec This implementation calls {@code defaultAction}.
       *
       * @param node {@inheritDoc}
       * @param p {@inheritDoc}
       * @return  the result of {@code defaultAction}
       * @since 14
       */
      @Override
      public R visitBindingPattern(BindingPatternTree node, P p) {
          return defaultAction(node, p);
      }
  
      /**
       * {@inheritDoc}
       *
       * @implSpec This implementation calls {@code defaultAction}.
       *
       * @param node {@inheritDoc}
       * @param p {@inheritDoc}
       * @return  the result of {@code defaultAction}
       * @since 17
       */
      @Override
      @PreviewFeature(feature=PreviewFeature.Feature.SWITCH_PATTERN_MATCHING, reflective=true)
      public R visitDefaultCaseLabel(DefaultCaseLabelTree node, P p) {
          return defaultAction(node, p);
      }
  
      /**
       * {@inheritDoc}
       *
       * @implSpec This implementation calls {@code defaultAction}.
       *
       * @param node {@inheritDoc}
       * @param p {@inheritDoc}
       * @return  the result of {@code defaultAction}
       */
      @Override
      public R visitArrayAccess(ArrayAccessTree node, P p) {
          return defaultAction(node, p);
      }
  
      /**
       * {@inheritDoc}
       *
       * @implSpec This implementation calls {@code defaultAction}.
       *
       * @param node {@inheritDoc}
       * @param p {@inheritDoc}
       * @return  the result of {@code defaultAction}
       */
      @Override
      public R visitMemberSelect(MemberSelectTree node, P p) {
          return defaultAction(node, p);
      }
  
      /**
       * {@inheritDoc}
       *
       * @implSpec This implementation calls {@code defaultAction}.
       *
       * @param node {@inheritDoc}
       * @param p {@inheritDoc}
       * @return  the result of {@code defaultAction}
       * @since 17
       */
      @Override
      @PreviewFeature(feature=PreviewFeature.Feature.SWITCH_PATTERN_MATCHING, reflective=true)
      public R visitParenthesizedPattern(ParenthesizedPatternTree node, P p) {
          return defaultAction(node, p);
      }
  
      /**
       * {@inheritDoc}
       *
       * @implSpec This implementation calls {@code defaultAction}.
       *
       * @param node {@inheritDoc}
       * @param p {@inheritDoc}
       * @return  the result of {@code defaultAction}
       * @since 17
       */
      @Override
      @PreviewFeature(feature=PreviewFeature.Feature.SWITCH_PATTERN_MATCHING, reflective=true)
      public R visitGuardedPattern(GuardedPatternTree node, P p) {
          return defaultAction(node, p);
      }
  
      /**
       * {@inheritDoc}
       *
       * @implSpec This implementation calls {@code defaultAction}.
       *
       * @param node {@inheritDoc}
       * @param p {@inheritDoc}
       * @return  the result of {@code defaultAction}
       */
      @Override
      public R visitMemberReference(MemberReferenceTree node, P p) {
          return defaultAction(node, p);
      }
  
      /**
       * {@inheritDoc}
       *
       * @implSpec This implementation calls {@code defaultAction}.
       *
       * @param node {@inheritDoc}
       * @param p {@inheritDoc}
       * @return  the result of {@code defaultAction}
       */
      @Override
      public R visitIdentifier(IdentifierTree node, P p) {
          return defaultAction(node, p);
      }
  
      /**
       * {@inheritDoc}
       *
       * @implSpec This implementation calls {@code defaultAction}.
       *
       * @param node {@inheritDoc}
       * @param p {@inheritDoc}
       * @return  the result of {@code defaultAction}
       */
      @Override
      public R visitLiteral(LiteralTree node, P p) {
          return defaultAction(node, p);
      }
  
      /**
       * {@inheritDoc}
       *
       * @implSpec This implementation calls {@code defaultAction}.
       *
       * @param node {@inheritDoc}
       * @param p {@inheritDoc}
       * @return  the result of {@code defaultAction}
       */
      @Override
      public R visitPrimitiveType(PrimitiveTypeTree node, P p) {
          return defaultAction(node, p);
      }
  
      /**
       * {@inheritDoc}
       *
       * @implSpec This implementation calls {@code defaultAction}.
       *
       * @param node {@inheritDoc}
       * @param p {@inheritDoc}
       * @return  the result of {@code defaultAction}
       */
      @Override
      public R visitArrayType(ArrayTypeTree node, P p) {
          return defaultAction(node, p);
      }
  
      /**
       * {@inheritDoc}
       *
       * @implSpec This implementation calls {@code defaultAction}.
       *
       * @param node {@inheritDoc}
       * @param p {@inheritDoc}
       * @return  the result of {@code defaultAction}
       */
      @Override
      public R visitParameterizedType(ParameterizedTypeTree node, P p) {
          return defaultAction(node, p);
      }
  
      /**
       * {@inheritDoc}
       *
       * @implSpec This implementation calls {@code defaultAction}.
       *
       * @param node {@inheritDoc}
       * @param p {@inheritDoc}
       * @return  the result of {@code defaultAction}
       */
      @Override
      public R visitUnionType(UnionTypeTree node, P p) {
          return defaultAction(node, p);
      }
  
      /**
       * {@inheritDoc}
       *
       * @implSpec This implementation calls {@code defaultAction}.
       *
       * @param node {@inheritDoc}
       * @param p {@inheritDoc}
       * @return  the result of {@code defaultAction}
       */
      @Override
      public R visitIntersectionType(IntersectionTypeTree node, P p) {
          return defaultAction(node, p);
      }
  
      /**
       * {@inheritDoc}
       *
       * @implSpec This implementation calls {@code defaultAction}.
       *
       * @param node {@inheritDoc}
       * @param p {@inheritDoc}
       * @return  the result of {@code defaultAction}
       */
      @Override
      public R visitTypeParameter(TypeParameterTree node, P p) {
          return defaultAction(node, p);
      }
  
      /**
       * {@inheritDoc}
       *
       * @implSpec This implementation calls {@code defaultAction}.
       *
       * @param node {@inheritDoc}
       * @param p {@inheritDoc}
       * @return  the result of {@code defaultAction}
       */
      @Override
      public R visitWildcard(WildcardTree node, P p) {
          return defaultAction(node, p);
      }
  
      /**
       * {@inheritDoc}
       *
       * @implSpec This implementation calls {@code defaultAction}.
       *
       * @param node {@inheritDoc}
       * @param p {@inheritDoc}
       * @return  the result of {@code defaultAction}
       */
      @Override
      public R visitModifiers(ModifiersTree node, P p) {
          return defaultAction(node, p);
      }
  
      /**
       * {@inheritDoc}
       *
       * @implSpec This implementation calls {@code defaultAction}.
       *
       * @param node {@inheritDoc}
       * @param p {@inheritDoc}
       * @return  the result of {@code defaultAction}
       */
      @Override
      public R visitAnnotation(AnnotationTree node, P p) {
          return defaultAction(node, p);
      }
  
      /**
       * {@inheritDoc}
       *
       * @implSpec This implementation calls {@code defaultAction}.
       *
       * @param node {@inheritDoc}
       * @param p {@inheritDoc}
       * @return  the result of {@code defaultAction}
       */
      @Override
      public R visitAnnotatedType(AnnotatedTypeTree node, P p) {
          return defaultAction(node, p);
      }
  
      /**
       * {@inheritDoc}
       *
       * @implSpec This implementation calls {@code defaultAction}.
       *
       * @param node {@inheritDoc}
       * @param p {@inheritDoc}
       * @return  the result of {@code defaultAction}
       */
      @Override
      public R visitModule(ModuleTree node, P p) {
          return defaultAction(node, p);
      }
  
      /**
       * {@inheritDoc}
       *
       * @implSpec This implementation calls {@code defaultAction}.
       *
       * @param node {@inheritDoc}
       * @param p {@inheritDoc}
       * @return  the result of {@code defaultAction}
       */
      @Override
      public R visitExports(ExportsTree node, P p) {
          return defaultAction(node, p);
      }
  
      /**
       * {@inheritDoc}
       *
       * @implSpec This implementation calls {@code defaultAction}.
       *
       * @param node {@inheritDoc}
       * @param p {@inheritDoc}
       * @return  the result of {@code defaultAction}
       */
      @Override
      public R visitOpens(OpensTree node, P p) {
          return defaultAction(node, p);
      }
  
      /**
       * {@inheritDoc}
       *
       * @implSpec This implementation calls {@code defaultAction}.
       *
       * @param node {@inheritDoc}
       * @param p {@inheritDoc}
       * @return  the result of {@code defaultAction}
       */
      @Override
      public R visitProvides(ProvidesTree node, P p) {
          return defaultAction(node, p);
      }
  
      /**
       * {@inheritDoc}
       *
       * @implSpec This implementation calls {@code defaultAction}.
       *
       * @param node {@inheritDoc}
       * @param p {@inheritDoc}
       * @return  the result of {@code defaultAction}
       */
      @Override
      public R visitRequires(RequiresTree node, P p) {
          return defaultAction(node, p);
      }
  
      /**
       * {@inheritDoc}
       *
       * @implSpec This implementation calls {@code defaultAction}.
       *
       * @param node {@inheritDoc}
       * @param p {@inheritDoc}
       * @return  the result of {@code defaultAction}
       */
      @Override
      public R visitUses(UsesTree node, P p) {
          return defaultAction(node, p);
      }
  
      /**
       * {@inheritDoc}
       *
       * @implSpec This implementation calls {@code defaultAction}.
       *
       * @param node {@inheritDoc}
       * @param p {@inheritDoc}
       * @return  the result of {@code defaultAction}
       */
      @Override
      public R visitErroneous(ErroneousTree node, P p) {
          return defaultAction(node, p);
      }
  
      /**
       * {@inheritDoc}
       *
       * @implSpec This implementation calls {@code defaultAction}.
       *
       * @param node {@inheritDoc}
       * @param p {@inheritDoc}
       * @return  the result of {@code defaultAction}
       */
      @Override
      public R visitOther(Tree node, P p) {
          return defaultAction(node, p);
      }
  
      /**
       * {@inheritDoc}
       *
       * @implSpec This implementation calls {@code defaultAction}.
       *
       * @param node {@inheritDoc}
       * @param p {@inheritDoc}
       * @return  the result of {@code defaultAction}
       */
      @Override
      public R visitYield(YieldTree node, P p) {
          return defaultAction(node, p);
      }
  }
  