// Build LazyLoadingValueHolderFactory as you want
$lazyLoadingFactory = new ProxyManager\Factory\LazyLoadingValueHolderFactory();
// Prepare you favorite container
$pimple = new Pimple\Container();
$pimple['service'] = function ($container) {
    return new HeavyService($container->get('dependency'));
};
// Create map (service name => class name) where you choose which services should be lazy loaded
$classMap = ['service' => HeavyService::class];
// Put all things to LazyContainer
$container = new LazyContainer($pimple, $lazyLoadingFactory, $classMap);
// Use LazyContainer exactly same like other PSR-11 container (thanks for interface)
$service = $container->get('service');
// Now $service is a proxy, so HeavyService wasn't created yet
// After first usage of $service is real HeavyService!
$result = $service->doSomething();