ObjectScript allows indirect access to object property values via $PROPERTY, but also to parameters, methods and class methods using $PARAMETER, $METHOD and $CLASSMETHOD respectively.
For instance:
// Write value of property bar in object reference foo:
write $property(foo, "bar"), !
However, using those functions may be an indication that the object model of the application suffers an abstraction failure. Moreover, those functions may fail in ways that actual property/parameter references or method calls will not.
If possible, you should redesign the code so that the need for these functions is not needed.