code: @Override
      public void clear()
      {
          int size = _size;
          if (size > 0)
          {
              size = size * 2;
              for (int i = 0; i < size; i++)
              {
                  _array[i] = null;
              }
  
              _size = 0;
          }
      }
docs: Removes all elements from the ArrayMap.