import GeoportalZoom from "gpf-ext-ol/controls/GeoportalZoom"
ou 
import { GeoportalZoom } from "gpf-ext-ol"

Events

zoom:in

Controls/Zoom/GeoportalZoom.js, line 95

event triggered on zoom in

zoom:out

Controls/Zoom/GeoportalZoom.js, line 114

event triggered on zoom out