calendarToggle callback

<input angular-mydatepicker [(ngModel)]="model" [options]="myDatePickerOptions" 
    #dp="angular-mydatepicker" (calendarToggle)="onCalendarToggle($event)">

import {IAngularMyDpOptions} from 'angular-mydatepicker';

export class MyApp {
    myDatePickerOptions: IAngularMyDpOptions = {
        // options here...
    }

    constructor() {}

    onCalendarToggle(event: number): void {
        console.log('onCalendarClosed(): Reason: ', event);
    }
}