How to use with vue-class-component?

I’m trying to do something like that:

import foo from 'store/modules/foo';

@Component({
  methods: foo.mapMutations(['bar', 'baz'])
})

But got an error: Argument types do not match parameters on mapMutations.

[ktsn]

• TypeScript does not infer this type of component from component options of decorator. So it is actually normal to produce error like setTest does not exist.
• If you want it to infer this type, you should use Vue.extend for mappers and inherit it.

import { Component, Vue } from 'vue-property-decorator';
import TestStore from './module';

const Super = Vue.extend({
  methods: TestStore.mapMutations(['setTest'])
})

@Component
export default class App extends Super {
  mounted() {
    this.setTest(true);
  }
}

[NikitaKA]

Yes, you were right - there is error, types working. It seems that WebStorm can’t recognize that… Sorry for bother you, thanks for help!

UPDATE Jetbrains support recommended me to install 2019.1 EAP (which adding better Typescript support in .vue files) and all errors are gone!