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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 dump(self, destination, with_defaults=False):
 """ Write configuration values to the specified destination. Args: destination: with_defaults (bool):
 if ``True``, values of items with no custom values will be included in the output if they have a default value set. """

        if isinstance(destination, six.string_types):
            with open(destination, 'w', encoding='utf-8') as f:
                self._rw.dump_config_to_file(self._config, f, with_defaults=with_defaults)
        else:
            self._rw.dump_config_to_file(self._config, destination, with_defaults=with_defaults)