true" title="class or interface in java.lang">NullPointerException</a></code> - if the passed in Bundle or permissions list are null</dd></dl>
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<pre>public static&nbsp;<a href="../../com/facebook/AccessTokenSource.html" title="enum in com.facebook">AccessTokenSource</a>&nbsp;getSource(<a href="http://d.android.com/reference/android/os/Bundle.html?is-external=true" title="class 