protected OAuthRegisteredService addRegisteredService() {
        return addRegisteredService(false, EnumSet.noneOf(OAuth20GrantTypes.class));
    }
This is {@link AbstractOAuth20Tests}.

@author Misagh Moayyed
@since 5.0.0
support/cas-server-support-oauth/src/test/java/org/apereo/cas/AbstractOAuth20Tests.java