*
     * @param c
     *            コピー元のコレクション
     */
    public CaseInsensitiveSet(final Collection<String> c) {
        map = new CaseInsensitiveMap<>(Math.max((int) (c.size() / .75f) + 1, 16));
        addAll(c);
    }

    /**
     * {@link CaseInsensitiveSet}を作成します。
     *
     * @param initialCapacity
     *            初期容量
     */
    public CaseInsensitiveSet(final int initialCapacity) {

        getAddAllUnsupportedSomePresentMethod());
  }

  @Override
  protected Collection<Method> suppressForConcurrentSkipListMap() {
    List<Method> methods = newArrayList();
    methods.addAll(super.suppressForConcurrentSkipListMap());
    methods.add(getContainsEntryWithIncomparableKeyMethod());
    methods.add(getContainsEntryWithIncomparableValueMethod());
    return methods;
  }

  // Needed to stop Eclipse whining
  private void resetWithHole() {
    List<E> container = new ArrayList<>();
    container.addAll(nCopies(a.getCount(), a.getElement()));
    container.addAll(nCopies(c.getCount(), c.getElement()));
    super.resetContainer(getSubjectGenerator().create(container.toArray()));
    sortedMultiset = (SortedMultiset<E>) getMultiset();
  }

     * @return this {@code Builder} object
     * @throws NullPointerException if {@code elements} contains a null element
     */
    @CanIgnoreReturnValue
    @Override
    public Builder<E> addAll(Iterable<? extends E> elements) {
      super.addAll(elements);
      return this;
    }

    /**
     * Adds each element of {@code elements} to the {@code ImmutableSortedSet}, ignoring duplicate

  @SuppressWarnings("rawtypes") // class literals
  @Override
  protected List<Class<? extends AbstractTester>> getTesters() {
    List<Class<? extends AbstractTester>> testers = copyToList(super.getTesters());
    testers.addAll(ConcurrentMapTestSuiteBuilder.TESTERS);
    return testers;
  }

  @Override
  NavigableMapTestSuiteBuilder<K, V> subSuiteUsing(TestSortedMapGenerator<K, V> generator) {
    return using(generator);
  }

    add(element, 1);
    return true;
  }

  /**
   * A sensible definition of {@link #addAll(Collection)} in terms of {@link #add(Object)} and
   * {@link #add(Object, int)}. If you override either of these methods, you may wish to override
   * {@link #addAll(Collection)} to forward to this implementation.
   *
   * @since 7.0
   */
  @Override

                    List<Plugin> pre = predecessors.get(entry.getKey());
                    if (pre != null) {
                        result.addAll(pre);
                    }
                    result.add(entry.getValue());
                }
                result.addAll(pending);

                builder.plugins(result);
            }
        }

        @Override
        protected Plugin mergePlugin(

        Set<String> exportedArtifacts = new HashSet<>(coreEntry.getExportedArtifacts());
        for (CoreExtensionEntry extension : extensionEntries) {
            exportedArtifacts.addAll(extension.getExportedArtifacts());
        }
        return exportedArtifacts;
    }

    protected Set<String> collectExportedPackages(

                    firstItems.add(item);
                } else {
                    secondItems.add(item);
                }
            }
        }
        firstWords.addAll(secondWords);
        firstItems.addAll(secondItems);
        return new SuggestResponse(index, searchResponse.getTook().getMillis(), firstWords, searchResponse.getHits().getTotalHits().value,
                firstItems);
    }

    }
  }

  public static class BuilderAddAllListGenerator extends TestStringListGenerator {
    @Override
    protected List<String> create(String[] elements) {
      return ImmutableList.<String>builder().addAll(asList(elements)).build();
    }
  }

  public static class BuilderReversedListGenerator extends TestStringListGenerator {
    @Override
    protected List<String> create(String[] elements) {