How to use the @bentley/ui-framework.UiFramework.iModelServices function in @bentley/ui-framework

private async startRetrieveViews() {
    if (this.props.iModelInfo) {
      const projectInfo = this.props.iModelInfo.projectInfo;
      const iModelWsgId = this.props.iModelInfo.wsgId;

      // this.setState({ waitingForViews: true });
      this._iModelConnection = await UiFramework.iModelServices.openIModel(projectInfo.wsgId, iModelWsgId);
    } else if (this.props.iModelConnection) {
      this._iModelConnection = this.props.iModelConnection;
    } else {
      throw Error("IModelViewPicker: Either iModelInfo or iModelConnection must be passed as Props");
    }

    const viewQueryParams: ViewQueryParams = { wantPrivate: false };
    let viewProps: ViewDefinitionProps[] = [];
    try {
      viewProps = await this._iModelConnection.views.queryProps(viewQueryParams);
      this.setState({ views: viewProps, waitingForViews: false });
    } catch (e) {
      // tslint:disable-next-line:no-console
      console.log("error getting views", e);
    }
  }

private async startRetrieveIModels(project: ProjectInfo) {
    this.setState({
      prompt: "Fetching iModel information...",
      isLoadingiModels: true,
      isLoadingProjects: false,
      currentProject: project,
    });
    const iModelInfos: IModelInfo[] = await UiFramework.iModelServices.getIModels(project, 40, 0);
    // tslint:disable-next-line:no-console
    // console.log(JSON.stringify(iModelInfos));
    this.setState({
      isLoadingiModels: false,
      iModels: iModelInfos,
    });
  }

public static async openIModelAndViews(projectId: string, iModelId: string, viewIdsSelected: Id64String[]) {
    // Close the current iModelConnection
    await SampleAppIModelApp.closeCurrentIModel();

    // open the imodel
    Logger.logInfo(SampleAppIModelApp.loggerCategory(this), `openIModelAndViews: projectId=${projectId}&iModelId=${iModelId}`);
    const iModelConnection = await UiFramework.iModelServices.openIModel(projectId, iModelId);
    SampleAppIModelApp.setIsIModelLocal(false, true);

    await this.openViews(iModelConnection, viewIdsSelected);
  }

private async startRetrieveThumbnail(projectId: string, iModelId: string) {
    const _thumbnail = await UiFramework.iModelServices.getThumbnail(projectId, iModelId);
    this.setState({ thumbnail: _thumbnail });
  }

private async startRetrieveThumbnail(thisIModel: IModelInfo) {
    this.setState({ waitingForThumbnail: true });
    thisIModel.thumbnail = await UiFramework.iModelServices.getThumbnail(thisIModel.projectInfo.wsgId, thisIModel.wsgId);
    this.setState({ waitingForThumbnail: false });
  }