returns a chain containing the equivalentvalue objects corresponding to expressions available before u. concode_field_sep Map<Unit,List<UnitValueBoxPair>> unitToPairsAfter concode_elem_sep Map<Unit,Chain> unitToEquivsAfter concode_elem_sep Map<Unit,Chain> unitToEquivsBefore concode_elem_sep Map<Unit,List<UnitValueBoxPair>> unitToPairsBefore concode_field_sep Chain getAvailableEquivsAfter concode_elem_sep List getAvailablePairsAfter concode_elem_sep List getAvailablePairsBefore
Chain function ( Unit arg0 ) { return unitToEquivsBefore . get ( arg0 ) ; }