public function up(): void 	{ 		Schema::create('custom_doll_part_variants', static function (Blueprint $table): void { 			$table->uuid('id')->primary(); 			$table->unsignedDouble('price')->nullable(); 			$table->unsignedDouble('weight')->nullable(); 			$table->uuid('variant_id'); 			$table->uuid('custom_doll_part_id'); 			$table->timestamps(); 			$table->index(Model::CREATED_AT);  			$table->foreign('variant_id')->references('id')->on('variants')->onDelete('cascade'); 			$table->foreign('custom_doll_part_id')->references('id')->on('custom_doll_parts')->onDelete('cascade'); 		}); 	}