private ImmutableMap<K, V> build(boolean throwIfDuplicateKeys) {
      if (throwIfDuplicateKeys && duplicateKey != null) {
        throw duplicateKey.exception();
      }
      /*
       * If entries is full, then this implementation may end up using the entries array
       * directly and writing over the entry objects with non-terminal entries, but this is

      this.size += other.size;
      return this;
    }

    private ImmutableMap<K, V> build(boolean throwIfDuplicateKeys) {
      /*
       * If entries is full, or if hash flooding is detected, then this implementation may end up
       * using the entries array directly and writing over the entry objects with non-terminal