an class="identifier">block</span></code> requests to stop if and when it
          gets to the next deflate block boundary. When decoding the zlib or gzip
          format, this will cause <code class="computeroutput"><span class="identifier">write</span></code>
          to return immediately after the header and before the first block. When
          doing a raw inflate, <code class="computeroutput"><span class="identifier">write</span></code>
          will go ahead and process the first block, and will