/**
* Get the given fence gate, with the given direction and state.
*
* @param int $blockRef BlockRef for the fence gate
* @param int $facing Direction the gate is facing; one of the FACING_ class constants
* @param int $open Either FenceGate::CLOSED or FenceGate::OPEN
*
* @throws \Exception
*/
public function __construct($blockRef, $facing, $open)
{
$this->checkBlock($blockRef, Ref::getRegexp('/^FENCE_GATE_/'));
$this->checkDataRefValidStartsWith($facing, 'FACING_', 'Invalid facing for fence gate');
$this->checkInList($open, [self::CLOSED, self::OPEN], 'Invalid open for fence gate');
$this->setBlockData($facing | $open);
}
