content: /*
   * Copyright 2015 Google Inc.
   *
   * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except
   * in compliance with the License. You may obtain a copy of the License at
   *
   *     http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software distributed under the License
   * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
   * or implied. See the License for the specific language governing permissions and limitations under
   * the License.
   */
  
  package com.google.googlejavaformat;
  
  /**
   * An {@code Op} is a member of the sequence of formatting operations emitted by {@link OpsBuilder}
   * and transformed by {@link DocBuilder} into a {@link Doc}. Leaf subclasses of {@link Doc}
   * implement {@code Op}; {@link Doc.Level} is the only non-leaf, and is represented by paired {@link
   * OpenOp}-{@link CloseOp} {@code Op}s.
   */
  public interface Op {
    /**
     * Add an {@code Op} to a {@link DocBuilder}.
     *
     * @param builder the {@link DocBuilder}
     */
    void add(DocBuilder builder);
  }
  