pinia操作是否可以划分为两个名称空间，以便在属性n1和n2上进行访问，从而：

// current
store.n1a('hi')
store.n2b()
// wanted
store.n1.a('hi')
store.n2.b()

// ugly workaround:
store.namespace1().a('hi')
// store would look like
  actions: {
    namespace1() {
      return {
        a(msg) {
          console.log(msg);
        }, 
      };
     ....
    },
  },

它有助于清洁f（）命名很多. bath.paint（）和kitchen.paint（）而不是bathPaint（）等类似：https://vuejs.org/api/options-state.html#expose