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In our example, the local object is that <code>Echoer()</code> instance, which inherits from <code class="API" base="twisted.spread">pb.Root</code>, which inherits from <code class="API" base="twisted.spread">pb.Referenceable</code>. It is that <code>Referenceable</code> class that makes the object eligible to be available for remote method calls<span class="footnote">There are a few other classes that can bestow this ability, but pb.Referenceable is the easiest to understand; see 'flavors' below for details on the others.</span>. If you have an object that is Referenceable, then any client that manages to get a reference to it can invoke any <code>remote_*</code> methods they please.