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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def is_argument(self, name):
 """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 """

        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
        )