ionic 2 DatePicker

I'm new to ionic and I'm playing with ionic 2 beta. I'm trying to implement a native datepicker using cordova plugin like in the documentation.

I've fully copy/paste the example, and I get "ReferenceError: DatePicker is not defined on Nexus 5 Emulator and Archos android phone.

openDatePicker() {
    var options = {
      date: new Date(),
      mode: 'date'
    };

    function onSuccess(date) {
        alert('Selected date: ' + date);
    }

    function onError(error) { // Android only
        alert('Error: ' + error);
    }

    DatePicker.show(options, onSuccess, onError);
  }

I've searched a lot and found nothing about this, maybe I'm doing it wrong with cordova plugin on Ionic 2?