@Nonnull
    public static <T> T load(@Nonnull Class<T> clazz) {
        Objects.requireNonNull(clazz, "clazz");
        return get(clazz).orElseThrow(() -> new IllegalStateException("No registration present for service '" + clazz.getName() + "'"));
    }
Loads a service instance, throwing a {@link IllegalStateException} if no registration is
present.

@param clazz the service class
@param <T> the service class type
@return the service instance
helper/src/main/java/me/lucko/helper/Services.java