public void addChildren(List<Route> routes) {
        if (routes != null) {
            for (Route route : routes) {
                addChild(route);
            }
        }
    }
<p>This is a convenience method to more easily add a list of children to
this. It will simply call the {@link #addChild} method for each element
in the list.</p>

@param routes A list of routes to add as children.
messagebus/src/main/java/com/yahoo/messagebus/routing/RoutingContext.java