private static void KeystoneRemoveProjectPermissionFromGroup(IamClient iamClient)
        {
            var keystoneRemovePermissionFromGroupOnProjectRequest =
                new KeystoneRemoveProjectPermissionFromGroupRequest()
            {
                ProjectId = "",
                GroupId   = "",
                RoleId    = ""
            };

            try
            {
                var keystoneRemovePermissionFromGroupOnProjectResponse =
                    iamClient.KeystoneRemoveProjectPermissionFromGroup(
                        keystoneRemovePermissionFromGroupOnProjectRequest);
                Console.WriteLine(
                    JsonConvert.SerializeObject(keystoneRemovePermissionFromGroupOnProjectResponse.HttpStatusCode));
            }
            catch (RequestTimeoutException requestTimeoutException)
            {
                Console.WriteLine(requestTimeoutException.ErrorMessage);
            }
            catch (ServiceResponseException clientRequestException)
            {
                Console.WriteLine(clientRequestException.HttpStatusCode);
                Console.WriteLine(clientRequestException.ErrorCode);
                Console.WriteLine(clientRequestException.ErrorMsg);
            }
            catch (ConnectionException connectionException)
            {
                Console.WriteLine(connectionException.ErrorMessage);
            }
        }