question: private synchronized void switchRemovedFromStore ( DatapathId dpid ) { if ( floodlightProvider . getRole ( ) != HARole . STANDBY ) { return ; } IOFSwitch oldSw = syncedSwitches . remove ( dpid ) ; if ( oldSw != null ) { addUpdateToQueue ( new SwitchUpdate ( dpid , SwitchUpdateType . REMOVED ) ) ; } else { } }
target:  Called when we receive a store notification about a switch that has been removed from the sync store