> <span class="ruby-value str">'escape'</span>
      <span class="ruby-ivar">@func</span> = <span class="ruby-identifier">properties</span>[<span class="ruby-identifier">:func</span>] <span class="ruby-operator">||</span> <span class="ruby-value str">'_add'</span>   <span class="ruby-comment cmt"># or 'display'</span>
    <span class="ruby-keyword kw">end</span>
</pre>
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