*/
    public Builder() {
      this(ImmutableCollection.Builder.DEFAULT_INITIAL_CAPACITY);
    }

    @SuppressWarnings({"unchecked", "rawtypes"})
    Builder(int initialCapacity) {
      this.entries = new @Nullable Entry[initialCapacity];
      this.size = 0;
      this.entriesUsed = false;
    }

    private void ensureCapacity(int minCapacity) {
      if (minCapacity > entries.length) {
        entries =