content: /*
   * Copyright 2022 Alibaba Group Holding Limited.
   *
   * 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.alibaba.graphscope.utils;
  
  import org.junit.Test;
  
  public class WildCardTest {
  
      public static class Conf<A, B, C> {
  
          private A a;
  
          public Conf() {}
  
          public void setA(A a) {
              this.a = a;
          }
  
          public A getA() {
              return a;
          }
      }
  
      public static <A, B, C> Conf<A, B, C> create(
              Class<? super A> clz, Class<? super B> clz2, Class<? super C> clz3) {
          return new Conf<A, B, C>();
      }
  
      @Test
      public void test1() {
          Conf<Long, Double, Integer> conf = create(Long.class, Double.class, Integer.class);
      }
  }
  