 href="../Index.html#getEffectiveIndex()">Index</a></code></span></div>
<div class="block">Returns the effective index, which Persistence objects will use to determine the identity of the index making
 persistence requests. Most Index implementations will typically return a reference to themselves ('this').
 However in advanced cases when one index delegates to another, the implementation of the wrapping index will
 create a subclass the delegate index, and override this method in the delegate index so that