teroutput"><span class="identifier">zs</span><span class="special">.</span><span class="identifier">adler</span></code> to the Adler-32 checksum of the
          dictionary chosen by the compressor and returns <code class="computeroutput"><span class="identifier">error</span><span class="special">::</span><span class="identifier">need_dictionary</span></code>;
          otherwise it sets <code class="computeroutput"><span class="identifier">zs</span><span class="special">.</span><span class="identifier">adl