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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 _get_headers(self, is_json=False):
 """ Create headers dictionary for a request. :param boolean is_json: Whether the request body is a json. :return: The headers dictionary. """


        headers = {"Authorization": "Bearer " + self._get_token()}

        if self.client_type is not None:
            headers["Client-Type"] = self.client_type

        if self.client_version is not None:
            headers["Client-Version"] = self.client_version

        if self.client_metatag is not None:
            headers["Client-Metatag"] = self.client_metatag

        if is_json:
            headers['Content-Type'] = 'application/json'

        return headers