def METHOD_NAME(self):
    class Foo(object):
        def method(self):
            pass
        @staticmethod
        def staticmethod():
            pass
        @classmethod
        def classmethod(cls):
            pass
    f = Foo()
    self.assertTrue(util.is_function(f.method))
    self.assertTrue(util.is_function(f.staticmethod))
    self.assertTrue(util.is_function(f.classmethod))