public function setHitEntityAttribute($hitIdentifier, $entityIdentifier, $attribute)
	{
		if(!array_key_exists($entityIdentifier, $this->entityClasses))
		{
			throw MappingException::invalidEntity($this->itemClass, $entityIdentifier);
		}
		$this->entityHitMapping[$entityIdentifier][$hitIdentifier] = $attribute;
		return $this;
	}