public function fetch( EntityId $entityId ) {
		return $this->cache->fetch( $this->getCacheIdFromEntityId( $entityId ) ) ?: null;
	}
public function fetch( EntityId $entityId ) {
		return $this->cache->fetch( $this->getCacheIdFromEntityId( $entityId ) ) ?: null;
	}
public function fetch ( EntityId $ entityId ) { return $ this -> cache -> fetch ( $ this -> getCacheIdFromEntityId ( $ entityId ) ) ? : null ; }
Returns an Entity from the cache

@param EntityId $entityId
@return EntityDocument|null
Returns an Entity from the cache