|string> */ public function rules(): array { return [ // 'provider' => 'required|string|in:google', 'class_topic' => 'required|string|max:255', 'class_date_and_time' => 'required|date', 'class_note' => 'nullable|string|max:1000', 'course_id' => 'required|exists:courses,id', ]; } }