subtractionAssignType

If I overload the sub-assign operator, what is the return type (null if not overloaded) of the expression this -= other If the sub-assign operator is not overloaded, this method should return null. When returning null, ShakeAssignable.subtractionAssignType will know that the sub-assign operator is not overloaded and will use the default sub-assign operator and resolve the type itself.

Parameters