def normalize_kind(self, kindlike):
if kindlike is None:<EOL><INDENT>return (object,)<EOL><DEDENT>elif isinstance(kindlike, type):<EOL><INDENT>return (kindlike,)<EOL><DEDENT>else:<EOL><INDENT>return tuple(kindlike)<EOL><DEDENT>
Make a kind out of a possible shorthand. If the given
        argument is a sequence of types or a singular type, it becomes
        a kind that accepts exactly those types. If the given argument
        is None, it becomes a type that accepts anything.