Returns the zoom level of the window.
Example
var finWindow = fin.desktop.Window.getCurrent();
finWindow.getZoomLevel(function (level) {
    console.log("zoom level: " +  level);
}, function (error) {
    console.log('error:', error);
});
Returns the zoom level of the window.
var finWindow = fin.desktop.Window.getCurrent();
finWindow.getZoomLevel(function (level) {
    console.log("zoom level: " +  level);
}, function (error) {
    console.log('error:', error);
});