@SuppressWarnings("UnusedVariable")
        public String getEntityIdFrom(final SamlRegisteredServiceCachingMetadataResolver resolver, final String attributeValue) {
            return attributeValue;
        }
Gets entity id from value.

@param resolver       the resolver
@param attributeValue the attribute value
@return the entity id from
support/cas-server-support-saml-idp-core/src/main/java/org/apereo/cas/support/saml/services/SamlIdPServicesManagerRegisteredServiceLocator.java