Google Maps API, setDirections() must not update map's position

Question

From what I learned from some sources, the setDirections() method automatically updates the map when associated directions have changed. I want the position to be set using map.fitBounds() method instead of the automatic update from the setDirections() method. Thank you.

directionsService.route({
    origin: {lat: 13.259876, lng: 123.759846},
    destination: {lat: 13.141377, lng: 123.759846},
    travelMode: 'WALKING'
}, function(response, status) {
    if (status === 'OK') {
        directionsDisplay.setDirections(response);
    } else {
        window.alert('Directions request failed due to ' + status);
    }
});

Answer 1

directionsDisplay = new DirectionsRenderer({preserveViewport:true})