vuex-module-decorators

const config: IConfig;

Action: {
    <T, R>(
        target: T,
        key: string | symbol,
        descriptor: TypedPropertyDescriptor<(...args: any[]) => R>
    ): void;
    <T>(params: ActionDecoratorParams): MethodDecorator;
};

getModule: <M extends VuexModule<ThisType<any>, any>>(
    moduleClass: ConstructorOf<M>,
    store?: Store<any>
) => M;

Module: {
    <S>(module: Function & Mod<S, any>): void;
    <S>(options: ModuleOptions): ClassDecorator;
};

Mutation: <T extends Object, R>(
    target: T,
    key: string | symbol,
    descriptor: TypedPropertyDescriptor<(...args: any[]) => R>
) => void;

MutationAction: {
    <K, T extends K>(
        target: { [k in keyof T]: T[k] },
        key: string | symbol,
        descriptor: TypedPropertyDescriptor<(...args: any[]) => Promise<K>>
    ): void;
    <T>(params: MutationActionParams<T>): (
        target: T,
        key: string | symbol,
        descriptor: TypedPropertyDescriptor<(...args: any[]) => Promise<T>>
    ) => void;
};