How to handle a callback to a third-party library function?

Question

Angular

I connect the PickPoint service library dynamically to the Order component.
I define a global variable. I call a modal window with postomats when clicked.
declare var PickPoint: any;

viewPickPoint() {
    PickPoint.open(this.resultPickPoint)
  }

I specify as Callback of function.

resultPickPoint(event) { 
  }

But I can't save the result anywhere, only alert(event) and console.log work.
Tell me how to process the Callback of a third-party library in order to save the result of the postomat selection.

Answer 1

Lost context?