o_Accepts
Answer whether these are acceptable argument types for invoking a FunctionDescriptor that is an instance of self. There may be more entries in the TupleDescriptor than are required by the function type.
Return
true if the arguments of the receiver are, pairwise, more general than the corresponding elements of the argTypes tuple, false otherwise.
Parameters
self
The receiver.
arg
A tuple containing the argument types to be checked.