How can I split up an module-class about vuex-module-decorators

[Levy-from-Odessa]

Simple but not clear (for me as a newbie in ts)
Just need do add every time decorator - @module
and if to use in separate files to export exactly class - export class ClassName .... {...}

import { Action, Module, Mutation, VuexModule } from 'vuex-module-decorators'

export interface ITest{
   someField: string;
   someField2: string;
}


@Module({
  namespaced: true,
  stateFactory: true,
})
class init extends VuexModule implements ITest {
   someField:string = '123'
   someField2:string = '123321'
}


@Module({
  namespaced: true,
  name: 'test',
  stateFactory: true,
})
export default class Test extends init{
  get getSomedata(){
    return this.someField + 'hello world'
  }


  @Mutation
  addData(s: string) {
    this.someField = s
  }

  @Action({ rawError: true })
  fetchData(s: string) {
    console.log(s);

    this.context.commit('addData', s)
  }
}