@Override
    @CanIgnoreReturnValue
    public AttributeDefinitionStore registerAttributeDefinition(final AttributeDefinition definition) {
        return registerAttributeDefinition(definition.getKey(), definition);
    }
Register attribute definitions.

@param entries the entries
core/cas-server-core-authentication-api/src/main/java/org/apereo/cas/authentication/attribute/DefaultAttributeDefinitionStore.java