Illuminate\Database\Eloquent\Relations\BelongsTo::__construct PHP Метод

    public function __construct(Builder $query, Model $parent, $foreignKey, $otherKey, $relation)
    {
        $this->otherKey = $otherKey;
        $this->relation = $relation;
        $this->foreignKey = $foreignKey;
        parent::__construct($query, $parent);
    }

 public function __construct(Builder $query, Model $parent, $foreignKey, $otherKey, $relationName)
 {
     $this->relationName = $relationName;
     parent::__construct($query, $parent, $foreignKey, $otherKey, $relationName);
 }