func IsInterfaceMethod(f *Type) bool {
	return f.Recv().Type == FakeRecvType()
}

// IsMethodApplicable reports whether method m can be called on a
// value of type t. This is necessary because we compute a single
// method set for both T and *T, but some *T methods are not
// applicable to T receivers.
func IsMethodApplicable(t *Type, m *Field) bool {