private void ListUserRoles()
 {
     openTasks++;
     UserRoleService.List()
     .SetCompletion(new OnCompletedHandler <ListResponse <UserRole> >(OnUserRoleListComplete))
     .Execute(client);
 }
 private void ListUserRolesWithImpersonation()
 {
     openTasks++;
     UserRoleService.List()
     .WithUserId(IMPERSONATION_TEST_USER_ID)
     .SetCompletion(new OnCompletedHandler <ListResponse <UserRole> >(OnUserRoleListComplete))
     .Execute(client);
 }