@Override
    public boolean isAvailable(final RegisteredService service) {
        return true;
    }
The {@link AbstractMultifactorAuthenticationProvider} is responsible for
as the parent of all providers.

@author Misagh Moayyed
@since 4.3
core/cas-server-core-authentication-mfa-api/src/main/java/org/apereo/cas/authentication/AbstractMultifactorAuthenticationProvider.java