private void removeKeyRangeReleaseLevel(final int level) {

        final LevelCache lc = _levelCache[level];
        Buffer buffer1 = lc._leftBuffer;
        Buffer buffer2 = lc._rightBuffer;

        if (buffer2 != null && (lc._flags & RIGHT_CLAIMED) != 0) {
            buffer2.releaseTouched();
        }
        if (buffer1 != null && (lc._flags & LEFT_CLAIMED) != 0) {
            buffer1.releaseTouched();
        }

        lc._leftBuffer = null;
        lc._rightBuffer = null;
        lc._flags = 0;
    }