code: def is_argument(self, name):
          
          if name == self.vararg:
              return True
          if name == self.kwarg:
              return True
          return (
              self.find_argname(name, True)[1] is not None
              or self.kwonlyargs
              and _find_arg(name, self.kwonlyargs, True)[1] is not None
          )
docs: Check if the given name is defined in the arguments.
  
          :param name: The name to check for.
          :type name: str
  
          :returns: True if the given name is defined in the arguments,
              False otherwise.
          :rtype: bool