code>&lt;cc:implementation&gt;</code> section of a
           composite component to act as the <em>using page</em> for
           another composite component.  When a composite component
           exposes a behavioral interface to the <em>using page</em>,
           such as a <code>&lt;cc:actionSource&gt;</code>,
           <code>&lt;cc:editableValueHolder&gt;</code>,
           <code>&lt;cc:valueHolder&gt;</code> or other
           behavioral interface, it must be possible to
           &#8220;propogate