/**
* Create a new has many relationship instance.
*
* @param \LMongo\Eloquent\Builder $query
* @param \LMongo\Eloquent\Model $parent
* @param string $foreignKey
* @param string $relation
* @return void
*/
public function __construct(Builder $query, Model $parent, $foreignKey, $relation)
{
$this->relation = $relation;
$this->foreignKey = $foreignKey;
parent::__construct($query, $parent);
}