question: the user for this user destination . concode_field_sep Set<String> targetDestinations concode_elem_sep String sourceDestination concode_elem_sep String subscribeDestination concode_elem_sep String user concode_field_sep Set<String> getTargetDestinations concode_elem_sep String getSourceDestination concode_elem_sep String getSubscribeDestination concode_elem_sep String toString
target: String function ( ) { return this . user ; }