registeredSchemes.put(type, implementationType);
    }

    @Override
    public <T extends Authentication> Map<Class<T>, Class<? extends T>> getRegisteredSchemes() {
        return Collections.unmodifiableMap(Cast.uncheckedNonnullCast(registeredSchemes));
    }

public interface AuthenticationSchemeRegistry {
    <T extends Authentication> void registerScheme(Class<T> type, final Class<? extends T> implementationType);
    <T extends Authentication> Map<Class<T>, Class<? extends T>> getRegisteredSchemes();

        for (Map.Entry<Class<Authentication>, Class<? extends Authentication>> e : authenticationSchemeRegistry.getRegisteredSchemes().entrySet()) {
            authenticationContainer.registerBinding(e.getKey(), e.getValue());
        }

        for (Map.Entry<Class<Authentication>, Class<? extends Authentication>> e : authenticationSchemeRegistry.getRegisteredSchemes().entrySet()) {
            container.registerBinding(e.getKey(), e.getValue());
        }

        return container;
    }