preselect ionic picker selected value

async openResultsShownPicker() {
  
    const columns = [{name:"resultsShown",options:this.resultsShownOptions, selectedIndex: this.filters.resultsShownIdx }];
    const translations = await this.translateService.get(['COMMON.CANCEL','COMMON.DONE']).toPromise()
    let picker = await this.pickerController.create({
      buttons: [
        {
          text: translations['COMMON.CANCEL'],
          role: 'cancel',
          handler:value =>  {
            picker.dismiss(value,'cancel');
            return false;
          }
        },
        {
          text: translations['COMMON.DONE'],
          role: 'done',
          handler:value =>  {
            picker.dismiss(value,'done');
          }
        }
      ],
      columns: columns
    });
    picker.present();
    picker.onDidDismiss().then(async data => {
      let col = await picker.getColumn('resultsShown');
      console.log("data",data);
      if (data.role == 'done') {
        this.updateResults(col);
      }
    });
  }