Picker handler object key undefined

Ionic Framework ionic-v3
1

Picker handler data return object with key set undefined

Not sure if this is a bug with the Picker or miss-used of the Picker component due to minimal documentation

numberPicker(){
    let optionsHours = this.setRange();
    this.pickerOptions.saveButton = {
      text: 'Save',
      handler: (data: any) => this.updateGoal(data)
    }

    this.pickerOptions.column = {
      selectedIndex: this.weeklGoal,
      options: optionsHours
    }
  }//numberPicker

  setRange(){
    let options = []
    for (let i = 0; i <= 99; i++) {
      options.push({
        value: i,
        text: i.toString()
      })
    }
    return options
  }
...
openPicker(){
    if(!this.allowPicker) {
      return false;
    }
    const picker = this.pickerController.create();

    picker.addButton('Cancel');
    picker.addButton(this.pickerOptions.saveButton);

    picker.addColumn(this.pickerOptions.column);

    picker.present();
  }//setGoal
...
updateGoal(data: any){
// sample response https://monosnap.com/file/jdCfrJ3CADQMYsDiJyTKtlElCCpV7D
    console.log(data) 
  }
2

Found it,

 this.pickerOptions.column = {
      name: 'columnName'm
      selectedIndex: this.weeklGoal,
      options: optionsHours
    }

will name handler data key by that name