belongsTo(Feedback::class); } public function fromDepartment(): BelongsTo { return $this->belongsTo(Department::class, 'from_department_id'); } public function toDepartment(): BelongsTo { return $this->belongsTo(Department::class, 'to_department_id'); } public function sender(): BelongsTo { return $this->belongsTo(User::class, 'sender_id'); } }