How to use the api/storage.PersistentStorage.persist function in api

addStateToMockedRequest(mockedRequestId, { name, response }) {
    this.findById(mockedRequestId).addState({ name, response });

    PersistentStorage.persist();
  }

addScenario(name) {
    this.scenarios.push(new Scenario({name}));

    PersistentStorage.persist();
  }

setGroups(groups) {
    this.all = groups.map((group) => new Group(group));

    PersistentStorage.dataTree.groups = this.all;
    PersistentStorage.persist();
  }
}

selectStateInMockedRequest(mockedRequestId, stateId) {
    this.findById(mockedRequestId).selectState(stateId);

    PersistentStorage.persist();
  }

mergeGroups(groups) {
    for (const group of groups) {
      const existingGroup = find(this.all, { id: group.id });

      if (existingGroup) {
        assign(existingGroup, group);
      } else {
        this.all.push(new Group(group));
      }
    }

    PersistentStorage.persist();
  }

updateMock(mockId, request) {
    this.find({ id: mockId }).update(request);

    PersistentStorage.persist();
  }

toggle(id) {
    const scenario = this.getById(id);
    scenario.active = !scenario.active;

    PersistentStorage.persist();
  }

updateMockRequest(scenarioId, mockRequestId, request) {
    this.getById(scenarioId).updateMockedRequest(mockRequestId, request);

    PersistentStorage.persist();
  }

addMockedRequest(capturedRequest) {
    this.mockedRequests.push(
      new MockedRequest(capturedRequest.buildMockedRequestData())
    );

    PersistentStorage.persist();
  }

const done = (id) => {
      PersistentStorage.persist();
      cb(id);
    };