Parses the signature of a method and its annotations to swagger.

        Return a dictionary {arg_name: info}.

def parse_signature(cls, function):
        '''Parses the signature of a method and its annotations to swagger.

        Return a dictionary {arg_name: info}.
        '''
        annotations = function.__annotations__.copy()
        del annotations['return']
        result = []
        for param_name, (param_type, param_obj) in annotations.items():
            sig_param = function.signature.parameters[param_name]
            param_description = {
                'paramType': param_type,
                'name': param_name,
                'required': sig_param.default is inspect.Parameter.empty}
            param_description.update(param_obj.describe())
            result.append(param_description)
        return result