public function up(): void 	{ 		Schema::create('applicants', function (Blueprint $table): void { 			$table->uuid('id')->primary(); 			$table->uuid('client_survey_id')->nullable(); 			$table->string('code', 50); 			$table->boolean('filled')->default(false); 			$table->boolean('draft')->default(true); 			$table->string('email', 50);  			$table->timestamps();  			$table->foreign('client_survey_id')->references('id')->on('client_surveys')->nullOnDelete();  			$table->index(Model::CREATED_AT); 		}); 	}