@Override
    public String transform(final String formUserId) throws Throwable {
        return watchableScript.execute(new Object[]{formUserId, LOGGER}, String.class, true);
    }
A transformer that delegates the transformation to a groovy script.

@author Misagh Moayyed
@since 5.2.0
core/cas-server-core-util-api/src/main/java/org/apereo/cas/util/transforms/GroovyPrincipalNameTransformer.java