class OtroCmp implements OnInit, OnDestroy, DoCheck, OnChange, AfterContentInit, AfterContentChecked,
AfterViewInit, AfterViewChecked){
console.log('constructor');
console.log('ng on init');
console.log('ngOnDestroy');
console.log('ngDoCheck');
console.log('ngOnChanges');
console.log('ngAfterContentInit');
console.log('ngAfterContentChecked');
console.log('ngAfterViewInit');
console.log('ngAfterViewChecked');