@Override
    public V1ConfigMap get(ApiClient apiClient, String name, String namespace) throws HyscaleException {
        CoreV1Api coreV1Api = new CoreV1Api(apiClient);
        V1ConfigMap configMap = null;
        try {
            configMap = coreV1Api.readNamespacedConfigMap(name, namespace, DeployerConstants.TRUE, null, null);
        } catch (ApiException e) {
            HyscaleException ex = ExceptionHelper.buildGetException(getKind(), e, ResourceOperation.GET);
            LOGGER.error("Error while fetching ConfigMap {} in namespace {}, error {}", name, namespace, ex.toString());
            throw ex;
        }
        return configMap;
    }
Fetch from cluster, populate required field in resource call update
deployer/deployer-services/src/main/java/io/hyscale/deployer/services/handler/impl/V1ConfigMapHandler.java