question: public boolean isEmpty ( ) { boolean parametersEmpty = true ; if ( parameters != null ) for ( Set < AccessPathTuple > paramSet : this . parameters ) if ( paramSet != null && ! paramSet . isEmpty ( ) ) { parametersEmpty = false ; break ; } return ( baseObjects == null || baseObjects . isEmpty ( ) ) && parametersEmpty && ( returnValues == null || returnValues . isEmpty ( ) ) ; }
target:  Checks whether this source/sink definition is empty, i.e., has no concrete access paths