I would like to know if it is possible to implicitly infer the type from the given example of components below :

@Component({
selector:'child',
template:`<button (click)="triggerChange()">Click Me</button>`
})
export class ChildComponent {
   @Output() inputchange = new EventEmitter<string>();

   triggerChange(){
      this.inputchange.emit('Hello!');
   }
}

while reading this output in the parent component

@Component({
template:`<child (inputchange)="childChanged($event)"></child>`
})
export class ParentComponent {

   childChanged(event){
      console.log(event);
   }

}

Currently there is no possible way to implicitly know the type of the output parameter, except if we explicitly define it ( childChanged(event: string){ ... })

So the my question is is there any way to implicitly infer, or know the type of the incoming parameter (or variable) in this case?