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<td class="colFirst"><code>abstract void</code></td>
<td class="colLast"><code><strong><a href="../../com/facebook/TokenCachingStrategy.html#clear()">clear</a></strong>()</code>
<div class="block">Called when a Session learns its token is no longer valid or during a
 call to <a href="../../com/facebook/Session.html#closeAndClearTokenInformation()"><code>closeAndClearTokenInformation</code></a> to clear the durable state associated with
 the token.</div>
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