@Override
    protected Unsecured instance(Mapping mapping, ConfigurationContext context) {
        return (Unsecured) AuthorizationStrategy.UNSECURED;
    }
Handles {@link AuthorizationStrategy.Unsecured} that requires a special treatment due to its singleton semantics.

@author Kohsuke Kawaguchi
plugin/src/main/java/io/jenkins/plugins/casc/core/UnsecuredAuthorizationStrategyConfigurator.java