rvice, you must provide a
 TokenCachingStrategy implementation that contains a valid token to the Session
 constructor. The resulting Session will be created in this state, and you
 can then safely call open, passing null for the Activity.
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<h4>OPENING</h4>
<pre>public static final&nbsp;<a href="../../com/facebook/SessionState.html" title="enum in com.facebook">SessionState</a> OPENING</pre>
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