def close(self):
self._logger.info("<STR_LIT>")<EOL>if self._pool is not None:<EOL><INDENT>self._pool.close()<EOL>self._pool = None<EOL><DEDENT>else:<EOL><INDENT>self._logger.warning(<EOL>"<STR_LIT>")<EOL><DEDENT>return<EOL>
Close the policy instance and its database connection pool.