def set_negative_aliases(self, negative_alias):
        """Set the negative aliases for this option parser.
        'negative_alias' should be a dictionary mapping option names to
        option names, both the key and value must already be defined
        in the option table."""
        self._check_alias_dict(negative_alias, "negative alias")
        self.negative_alias = negative_alias
Set the negative aliases for this option parser.
        'negative_alias' should be a dictionary mapping option names to
        option names, both the key and value must already be defined
        in the option table.
product/gradle-plugin/src/main/python/setuptools/_distutils/fancy_getopt.py