public function up() 	{ 		Schema::table('order_items', function (Blueprint $table) { 			$table->decimal('price')->change(); 			$table->decimal('tax')->nullable()->change(); 			$table->decimal('discount_amount')->nullable()->change(); 			$table->decimal('total_price')->change(); 			$table->decimal('total_price_minus_discounts')->change(); 		}); 	}