nt</span>
<span class="Identifier">es</span><span class="Operator">.</span><span class="Identifier">handle</span><span class="Punctuation">(</span><span class="Identifier">msg</span><span class="Punctuation">)</span><span class="Punctuation">:</span>
  <span class="Identifier">messages</span><span class="Operator">.</span><span class="Identifier">add</span><span class="Punctuation">(</span><span class="Identifier">msg</span><span class="Punctuation">)</span>
<span class="Identifier">es</span><span class="Op