question: private void handle200OK ( SipTransactionContext ctx ) { if ( logger . isActivated ( ) ) { logger . info ( "200 OK response received" ) ; } mSubscribed = true ; SipResponse resp = ctx . getSipResponse ( ) ; mDialogPath . setRemoteTag ( resp . getToTag ( ) ) ; mDialogPath . setTarget ( resp . getContactURI ( ) ) ; mAuthenticationAgent . readProxyAuthenticateHeader ( resp ) ; retrieveExpirePeriod ( resp ) ; startTimer ( System . currentTimeMillis ( ) , mExpirePeriod , 0.5 ) ; }
target:  Handle 200 0K response