<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def _params_type(self, method_name, instance):
 """ Check to see if this is a legacy method or shiny new one legacy update method: def update(self, i3s_output_list, i3s_config):
 new update method: def update(self):
 Returns False if the method does not exist, else PARAMS_NEW or PARAMS_LEGACY """


        method = getattr(instance, method_name, None)
        if not method:
            return False

        # Check the parameters we simply count the number of args and don't
        # allow any extras like keywords.
        arg_count = 1
        # on_click method has extra events parameter
        if method_name == "on_click":
            arg_count = 2
        args, vargs, kw, defaults = inspect.getargspec(method)
        if len(args) == arg_count and not vargs and not kw:
            return self.PARAMS_NEW
        else:
            return self.PARAMS_LEGACY