// Map Binder so you can do utility methods
map("myBinder").toValue( this );
// Map the singleton maps
map("s1Map").toFactoryMethod("myBinder", "buildMap")
    .methodArg(name="mapType", value="1");


// Map A service with a singleton map
map("Service").to("path")
    .initArg(name="myMap", ref="s1Map");


// Utility method to build singleton maps
function buildMap(mapType){
    switch( arguments.mapType ){
        case 1 : {
            return {
                s1 = getInjector().getInstance('s1'),
                s2 = getInjector().getInstance('s2')
            };
        }
    }

}