How to use the node-persist.set function in node-persist

          setItem: (id, item) => persist.set(id, item),
          getAllKeys: () => Promise.resolve(persist.keys()),

async add(target: Target$) {
    const self = this;
    _.remove(
      this.repositories,
      repo =>
        repo.source === target.source &&
        repo.owner === target.owner &&
        repo.name === target.name &&
        repo.path === target.path
    );
    self.repositories.push(target);
    await storage.set(self.key, self.repositories);
  }

async clean() {
    this.repositories = [];
    await storage.set(this.key, this.repositories);
  }

async remove(target: Target$) {
    let before = this.repositories.slice();
    _.remove(
      this.repositories,
      repo =>
        repo.source === target.source &&
        repo.owner === target.owner &&
        repo.name === target.name &&
        repo.path === target.path
    );
    const after = this.repositories;
    if (!_.isEqual(before, after)) {
      await storage.set(this.key, this.repositories);
    }
  }