OutlookAddIn_OneDrive_saveMailTo.ts

private saveMailTo = () => {
    this.setState((prevState: IOneDriveState, props: IOneDriveProps) => {
      return {
        showSpinner: true
      };
    });
    this.props.graphController.retrieveMimeMail(this.state.parentFolder.driveID, this.state.parentFolder.id, this.props.mail, this.saveMailCallback)
      .then((response: string) => {
        const saveLocationDisplayName = `OneDrive ...> ${this.state.grandParentFolder.name} > ${this.state.parentFolder.name}`;
        this.props.graphController.saveMailMetadata(this.props.mail.id, saveLocationDisplayName, this.state.parentFolder.webUrl, new Date());
      });    
  }