Suggested Routes Option in Google Maps API?

Question

I have a requirement to show multiple routes between the source and destination. Eg: If i am selecting a source and destination i am able to find one single route. But as in

Answer 1

from the documentation:

provideRouteAlternatives (optional) when set to true specifies that the Directions service may provide more than one route alternative in the response. Note that providing route alternatives may increase the response time from the server.

example

var request = {
    origin: start,
    destination: end,
    travelMode: google.maps.DirectionsTravelMode.DRIVING,
    provideRouteAlternatives: true
};