Domain\Student\Student::delayedPayments PHP Method

    public function delayedPayments()
    {
        $student = $this->with(['billets' => function ($b) {
            $b->where('due_date', '<', date('Y-m-d'))->where('student_id', $this->id);
        }])->whereHas('billets', function ($b) {
            $b->where('due_date', '<', date('Y-m-d'))->where('student_id', $this->id);
        })->first();
        if (is_null($student)) {
            return [];
        }
        return $student->billets;
    }