testers.add(CollectionSerializationEqualTester.class);
    testers.add(MultisetAddTester.class);
    testers.add(MultisetContainsTester.class);
    testers.add(MultisetCountTester.class);
    testers.add(MultisetElementSetTester.class);
    testers.add(MultisetEqualsTester.class);
    testers.add(MultisetReadsTester.class);
    testers.add(MultisetSetCountConditionallyTester.class);

  @CollectionFeature.Require(SUPPORTS_ADD)
  @CollectionSize.Require(absent = ZERO)
  public void testAdd_supportedPresent() {
    assertTrue("add(present) should return true", getList().add(e0()));
    expectAdded(e0());
  }

  @CollectionFeature.Require(absent = SUPPORTS_ADD)
  @CollectionSize.Require(absent = ZERO)
  /*
   * absent = ZERO isn't required, since unmodList.add() must

    Multiset<String> ms = LinkedHashMultiset.create();
    ms.add("a", 3);
    ms.add("c", 1);
    ms.add("b", 2);

    assertEquals("[a x 3, c, b x 2]", ms.toString());
  }

  public void testLosesPlaceInLine() throws Exception {
    Multiset<String> ms = LinkedHashMultiset.create();
    ms.add("a");
    ms.add("b", 2);
    ms.add("c");
    assertThat(ms.elementSet()).containsExactly("a", "b", "c").inOrder();

    Multiset<String> ms = LinkedHashMultiset.create();
    ms.add("a", 3);
    ms.add("c", 1);
    ms.add("b", 2);

    assertEquals("[a x 3, c, b x 2]", ms.toString());
  }

  public void testLosesPlaceInLine() throws Exception {
    Multiset<String> ms = LinkedHashMultiset.create();
    ms.add("a");
    ms.add("b", 2);
    ms.add("c");
    assertThat(ms.elementSet()).containsExactly("a", "b", "c").inOrder();

    add_output1 = TF_OutputListGet(add_outputs, 0);
    TF_DeleteOutputList(add_outputs);
  }

  // Same with a second "Add" computing `arg1 + arg1`.
  TF_AbstractTensor* add_output2;
  {
    // Build an abstract operation, inputs and output.
    auto* add_op = TF_NewAbstractOp(graph_ctx);
    TF_AbstractOpSetOpType(add_op, "Add", s);
    ASSERT_EQ(TF_OK, TF_GetCode(s)) << TF_Message(s);
    TF_AbstractOpSetOpName(add_op, "my_add", s);

    ImmutableIntArray rightSized = ImmutableIntArray.builder(3).add(0).add(1).add(3).build();
    assertDoesntActuallyTrim(rightSized);

    ImmutableIntArray overSized = ImmutableIntArray.builder(3).add(0).add(1).build();
    assertActuallyTrims(overSized);

    ImmutableIntArray underSized = ImmutableIntArray.builder(2).add(0).add(1).add(3).build();
    assertActuallyTrims(underSized);
  }

  @J2ktIncompatible

    testers.add(CollectionSerializationEqualTester.class);
    testers.add(ListAddAllAtIndexTester.class);
    testers.add(ListAddAllTester.class);
    testers.add(ListAddAtIndexTester.class);
    testers.add(ListAddTester.class);
    testers.add(ListCreationTester.class);
    testers.add(ListEqualsTester.class);
    testers.add(ListGetTester.class);
    testers.add(ListHashCodeTester.class);

            the add-opens. Right now that doesn't seem worth the effort, though.
        -->
        <test.add.opens>
          --add-opens java.base/java.lang=ALL-UNNAMED
          --add-opens java.base/java.util=ALL-UNNAMED
          --add-opens java.base/sun.security.jca=ALL-UNNAMED
        </test.add.opens>
      </properties>
    </profile>
    <profile>

        projectBuilds.add(createProjectBuild(A, session, segment));
        projectBuilds.add(createProjectBuild(B, session, segment));
        projectBuilds.add(createProjectBuild(C, session, segment));
        projectBuilds.add(createProjectBuild(X, session, segment));
        projectBuilds.add(createProjectBuild(Y, session, segment));
        projectBuilds.add(createProjectBuild(Z, session, segment));

        List<String> msgs = new ArrayList<>();
        msgs.add("*****************************************************************");
        msgs.add("* Your build is requesting parallel execution, but project      *");
        msgs.add("* contains the following plugin(s) that have goals not marked   *");
        msgs.add("* as @threadSafe to support parallel building.                  *");