|string> */ public function rules(): array { return [ 'project_id' => 'required|string', 'project_type_id' => 'required|string', 'nib' => 'required|string', 'business_name' => 'required|string', 'oss_publication_date' => 'required', 'investment_status_description' => 'required|string', 'business_form' => 'required|string', 'project_risk' => 'required|string', 'project_name' => 'required|string', 'business_scale' => 'required|string', 'business_address' => 'required|string', 'district_name' => 'required', 'village_name' => 'required', 'longitude' => 'required|string', 'latitude' => 'required|string', 'project_submission_date' => 'required', 'kbli' => 'required|string', 'kbli_title' => 'required|string', 'supervisory_sector' => 'required|string', 'user_name' => 'required|string', 'email' => 'required|string', 'contact' => 'required|string', 'land_area_in_m2' => 'required|string', 'investment_amount' => 'required|string', 'tki' => 'required|string', ]; } }