Return the specific methods of the class

        :param class_name: the class name of the method
        :type class_name: string
        :param method_name: the name of the method
        :type method_name: string

        :rtype: None or a :class:`EncodedMethod` object

def get_methods_descriptor(self, class_name, method_name):
        """
        Return the specific methods of the class

        :param class_name: the class name of the method
        :type class_name: string
        :param method_name: the name of the method
        :type method_name: string

        :rtype: None or a :class:`EncodedMethod` object
        """
        l = []
        for i in self.get_classes():
            if i.get_name() == class_name:
                for j in i.get_methods():
                    if j.get_name() == method_name:
                        l.append(j)

        return l