anchor.diff:  
   set_group_user_privileges(GID, UID, Privileges, ReqParams) ->
       {RestAddress, Headers, Options} = ReqParams,
  +    Body = jiffy:encode({[
  +        {privileges, Privileges}
  +    ]}),
       Response =
           do_request(
               RestAddress ++ "/groups/" ++ binary_to_list(GID) ++ "/users/" ++
                   binary_to_list(UID) ++ "/privileges",
  -            Headers, put, [], Options
  +            Headers, put, Body, Options
           ),
       %% TODO remove below line after tests
       ?PRINT(Response),
  
positive.code:                 provider_space_test,
                  provider_check_test
              ]
          }
          ,
          {
              user_rest_module_test_group,
              [],
  
negative.code:      Body = jiffy:encode({[
          {name, NewGroupName}
      ]}),
  %%     TODO remove print
      Response = do_request(RestAddress ++ "/groups/" ++ binary_to_list(GID) , Headers, patch, Body, Options).
      ?PRINT(Response),
      Response.
  
  delete_group(GID, ReqParams) ->
      {RestAddress, Headers, Options} = ReqParams,
  