protected Issuer buildSamlResponseIssuer(final String entityId) {
        val issuer = newIssuer(entityId);
        issuer.setFormat(NameIDType.ENTITY);
        return issuer;
    }
The {@link BaseSamlProfileSamlResponseBuilder} is responsible for
building the final SAML assertion for the relying party.

@author Misagh Moayyed
@since 4.2
support/cas-server-support-saml-idp-web/src/main/java/org/apereo/cas/support/saml/web/idp/profile/builders/response/BaseSamlProfileSamlResponseBuilder.java