@Override
    public boolean containsMappedAttribute(final String claim, final RegisteredService registeredService) {
        val container = getClaimMappingsContainer(registeredService);
        return claimsToAttribute.containsKey(claim) || container.containsKey(claim);
    }
Map OIDC claim to an attribute.
support/cas-server-support-oidc-core-api/src/main/java/org/apereo/cas/oidc/claims/OidcDefaultAttributeToScopeClaimMapper.java