# File lib/mocha/instance_method.rb, line 22 22: def singleton_method?(method) 23: __metaclass__ = stubbee.__metaclass__ 24: return true if __metaclass__.public_instance_methods(false).include?(method) 25: return true if __metaclass__.protected_instance_methods(false).include?(method) 26: return true if __metaclass__.private_instance_methods(false).include?(method) 27: return false 28: end