ImmutableSet<E> result;
          if (hashTable != null && chooseTableSize(size) == hashTable.length) {
            @Nullable
            Object[] uniqueElements =
                shouldTrim(size, contents.length) ? Arrays.copyOf(contents, size) : contents;
            result =
                new RegularImmutableSet<E>(
                    uniqueElements, hashCode, hashTable, hashTable.length - 1, size);
          } else {

          int index = j & mask;
          if (hashTable[index] == null) {
            hashTable[index] = e;
            break;
          }
        }
      }
      return hashTable;
    }

    void ensureTableCapacity(int minCapacity) {
      int newTableSize;
      if (hashTable == null) {
        newTableSize = chooseTableSize(minCapacity);
        hashTable = new Object[newTableSize];