/**
* @param Entity $entity
*
* @throws LevelException
*/
public function addEntity(Entity $entity)
{
if ($entity->getLevel() !== $this) {
throw new LevelException("Invalid Entity level");
}
if ($entity instanceof Player) {
$this->players[$entity->getId()] = $entity;
}
$this->entities[$entity->getId()] = $entity;
}