Ember.js: How to pass component attribute to jQuery callback?

My component

{{remind-me datetime=model.reminderDatetime comment=model.reminderComment}}

My remind-me.js:

import Ember from 'ember';

export default Ember.Component.extend({  

    picker: $(),

    didInsertElement() {
        this._super(...arguments);

        this.picker = $('.pickadate').pickadate({
                format: 'mmm dd, yyyy',
                onOpen: function() {

                    // how to get there this.get('datetime') ?           

                }
        });
    }
});

How to pass component attribute datetime to jQuery callback onOpen? Thank you for answers.