@Override
        protected String getDescription() {
            return String.format(
                "Chained substitutor of '%s' and then '%s'",
                defaultInstance.getDescription(),
                configuredInstance.getDescription()
            );
        }
Wrapper substitutor that passes the original image name through a default substitutor and then the configured one
core/src/main/java/org/testcontainers/utility/ImageNameSubstitutor.java