HarmonyOS 两个object怎么拼接成一个？

字典拼接参考以下代码示例：

export class ListClass {
  test() {
    let dict1: Map<string, number> = new Map();
    dict1.set("a", 1);
    dict1.set("b", 2);
    let dict2: Map<string, number> = new Map();
    dict2.set("c", 3);
    dict2.set("d", 4);
    let combinedDict: Map<string, number>[] = [dict1, dict2];
  }
}