core/src/main/java/io/fabric8/maven/core/util/kubernetes/KubernetesHelper.java
public static String getResourceVersion(HasMetadata entity) {
        if (entity != null) {
            ObjectMeta metadata = entity.getMetadata();
            if (metadata != null) {
                String resourceVersion = metadata.getResourceVersion();
                if (StringUtils.isNotBlank(resourceVersion)) {
                    return resourceVersion;
                }
            }
        }
        return null;
    }
public static String getResourceVersion(HasMetadata entity) {
        if (entity != null) {
            ObjectMeta metadata = entity.getMetadata();
            if (metadata != null) {
                String resourceVersion = metadata.getResourceVersion();
                if (StringUtils.isNotBlank(resourceVersion)) {
                    return resourceVersion;
                }
            }
        }
        return null;
    }
Returns the resource version for the entity or null if it does not have one