…ning getter / setter properties using Lambda functions that accept owner object ('this') as one of parameters, thus allowing to implement properties that require access to instance fields etc.

…bdaSlotTest.java

Co-authored-by: Roland Praml <[email protected]>

…etPropertyDescriptor only creates single instance of get/set LambdaFunctions, instead of instance per call

… PropertyDescriptor sets writable, enumerable and configurable attributes, plus calling validation on those when creating new LambdaAccessorSlot properties