Invoke the member function pointer held by this wrapper on the specified object reference to a non-modifiable instance of the parameterized INSTANCE type, with the specified arguments arg1 up to arg2, and return the result of this invocation, or void if this member function pointer does not return a result.
Declared in <bdlf_memfn.h>
template<class INSTANCE>
ResultType
operator()(
INSTANCE const& object,
ARG1 arg1,
ARG2 arg2) const;