[standalone@localhost:9990 /] /subsystem=elytron/provider-loader=bc:add(module=org.bouncycastle)
{"outcome" => "success"}
[standalone@localhost:9990 /] /subsystem=elytron/provider-loader=bc:read-attribute(name=loaded-providers)
{
    "outcome" => "success",
    "result" => undefined
}

[standalone@localhost:9990 /] /subsystem=elytron/provider-loader=bc2:add(class-names=[org.bouncycastle.jce.provider.BouncyCastleProvider], module=org.bouncycastle)
{"outcome" => "success"}
[standalone@localhost:9990 /] /subsystem=elytron/provider-loader=bc2:read-attribute(name=loaded-providers)
{
    "outcome" => "success",
    "result" => [{
        "name" => "BC",
        "info" => "BouncyCastle Security Provider v1.56",
        "version" => 1.56,
        "services" => [
            {
                "type" => "MessageDigest",
                "algorithm" => "GOST3411",
                "class-name" => "org.bouncycastle.jcajce.provider.digest.GOST3411$Digest"
            },
            {
                "type" => "Mac",
                "algorithm" => "HMACGOST3411",
                "class-name" => "org.bouncycastle.jcajce.provider.digest.GOST3411$HashMac"
            },
            {
                "type" => "KeyGenerator",
                "algorithm" => "HMACGOST3411",
                "class-name" => "org.bouncycastle.jcajce.provider.digest.GOST3411$KeyGenerator"
            },
            {
                "type" => "MessageDigest",
                "algorithm" => "GOST3411-2012-256",
                "class-name" => "org.bouncycastle.jcajce.provider.digest.GOST3411$Digest2012_256"
            },
	...

            ClassLoader classLoader = doPrivileged((PrivilegedExceptionAction<ClassLoader>) () -> resolveClassLoader(module));
            final List<Provider> loadedProviders;
	    if (classNames != null) {
		loadedProviders = new ArrayList<>(classNames.length);
		for (String className : classNames) {
		    Class<? extends Provider> providerClazz = classLoader.loadClass(className).asSubclass(Provider.class);
		    loadedProviders.add(providerClazz.newInstance());
		}
	    } else {
		loadedProviders = new ArrayList<>();
		ServiceLoader<Provider> loader = ServiceLoader.load(Provider.class, classLoader);
		loader.forEach(loadedProviders::add);
	    }