added some typedocs

shut up PhpStorm

src/pocketmine/level/Level.php

@@ -1887,6 +1887,7 @@ class Level implements ChunkManager, Metadatable{
 			for($x = $minX; $x <= $maxX; ++$x){
 				for($z = $minZ; $z <= $maxZ; ++$z){
 					foreach($this->getChunkEntities($x, $z) as $ent){
+						/** @var Entity|null $entity */
 						if(($entity === null or ($ent !== $entity and $entity->canCollideWith($ent))) and $ent->boundingBox->intersectsWith($bb)){
 							$nearby[] = $ent;
 						}