return createFromEntries(entries);
  }

  public abstract Set<Entry<K, V>> createFromEntries(Entry<K, V>[] entries);

  @Override
  @SuppressWarnings("unchecked") // generic arrays make typesafety sad
  public Entry<K, V>[] createArray(int length) {
    return (Entry<K, V>[]) new Entry<?, ?>[length];
  }

  /** Returns the original element list, unchanged. */
  @Override

        /*
         * give each source folder a unique corresponding output folder
         * outside of the usual `build` folder. We can't put the build
         * in the usual build folder because eclipse becomes *very* sad
         * if we delete it. Which `gradlew clean` does all the time.
         */
        classpath.getEntries().findAll{ s -> s instanceof SourceFolder }.eachWithIndex { s, i ->
            s.setOutput("out/eclipse" + i)

    return createFromEntries(entries);
  }

  public abstract Set<Entry<K, V>> createFromEntries(Entry<K, V>[] entries);

  @Override
  @SuppressWarnings("unchecked") // generic arrays make typesafety sad
  public Entry<K, V>[] createArray(int length) {
    return (Entry<K, V>[]) new Entry<?, ?>[length];
  }

  /** Returns the original element list, unchanged. */
  @Override

  // It's a constant, and we can't use ImmutableMap here without creating a circular dependency.
  @SuppressWarnings("ConstantCaseForConstants")
  private static final Map<Class<?>, Class<?>> WRAPPER_TO_PRIMITIVE_TYPE;

  // Sad that we can't use a BiMap. :(

  static {
    Map<Class<?>, Class<?>> primToWrap = new LinkedHashMap<>(16);
    Map<Class<?>, Class<?>> wrapToPrim = new LinkedHashMap<>(16);

                     * outside of the usual `build` folder. We can't put the build
                     * in the usual build folder because eclipse becomes *very* sad
                     * if we delete it. Which `gradlew clean` does all the time.
                     */
                    int i = 0;