Overrides \Symfony\Component\HttpKernel\Bundle\Bundle::build().
Overrides Bundle::build
public function build(ContainerBuilder $container) {
// Add a compiler pass for adding Normalizers and Encoders to Serializer.
$container
->addCompilerPass(new RegisterSerializationClassesCompilerPass());
// Add a compiler pass for adding concrete Resolvers to chain Resolver.
$container
->addCompilerPass(new RegisterEntityResolversCompilerPass());
}