def METHOD_NAME(self) -> Dict[str, int]:
    """
    Return immediate measures of the pool (not counters).
    """
    return {
        self._POOL_MIN: self._min_size,
        self._POOL_MAX: self._max_size,
        self._POOL_SIZE: self._nconns,
        self._POOL_AVAILABLE: len(self._pool),
    }