b/compositepublisher.rb, line 12</span>
12:     <span class="ruby-keyword kw">def</span> <span class="ruby-identifier">add</span>(<span class="ruby-identifier">pub</span>)
13:       <span class="ruby-ivar">@publishers</span> <span class="ruby-operator">&lt;&lt;</span> <span class="ruby-identifier">pub</span>
14:     <span class="ruby-keyword kw">end</span></pre>
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