                   <a href="https://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a>&nbsp;base)</code>
<div class="block">If the base object is a map, returns an <code>Iterator</code> containing the set of keys available in the
 <code>Map</code>.</div>
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<tr id="i2" class="altColor">
<td class="colFirst"><code><a href="https://docs.oracle.com/javase/7/docs/api/java/lang/Class.html?is-external=true" title="class or interfac