question: private FCZoneReference findFCZoneReferenceForVolGroupKey ( URI exportGroupURI , URI volumeURI , String refKey , String [ ] newOrExisting ) { Map < String , FCZoneReference > volRefMap = _networkScheduler . makeExportToReferenceMap ( refKey ) ; String volExportKey = make2UriKey ( volumeURI , exportGroupURI ) ; if ( volRefMap . containsKey ( volExportKey ) ) { FCZoneReference ref = volRefMap . get ( volExportKey ) ; if ( ref != null && ref . getInactive ( ) == false ) { _log . info ( String . format ( "Existing zone reference: vol %s group %s refkey %s" , volumeURI , exportGroupURI , refKey ) ) ; newOrExisting [ 0 ] = "Existing" ; return ref ; } } return null ; }
target:  Looks in the database for a zone for the same volume and export group and key