anchor.diff:      % add some supports with not imported storages
       AddMultipleNotImportedSupportsFun(),
       
  +    {ok, ImportedStorageP2} = oz_test_utils:create_imported_storage(Config, ?PROVIDER(P2), ?STORAGE_NAME1),
       % support space with imported storage
  -    {ok, ImportedStorageP2} = oz_test_utils:create_imported_storage(Config, ?PROVIDER(P2), ?STORAGE_NAME1),
       {ok, _} = oz_test_utils:support_space(Config, ?PROVIDER(P1), ImportedStorageP1, S1),
       
       % check that adding next support with imported storage fails
  
positive.code:         data_spec = #data_spec{
              required = [<<"token">>, <<"size">>],
              correct_values = #{
                  <<"token">> => [CreateTokenFun(S1)],
                  <<"size">> => [MinSupportSize]
              }
          }
      },
      ?assert(api_test_utils:run_tests(Config, ApiTestSpec)),
      
      % supporting second space with imported storage also should fail
      ApiTestSpec1 = #api_test_spec{
          client_spec = #client_spec{
              correct = [{provider, P1, P1Token}]
          },
  
negative.code:             }
          }
      },
      ?assert(api_test_utils:run_tests(Config, ApiTestSpec2)),
      
      % check that space still can be supported with not imported storages
      AddMultipleNotImportedSupportsFun().
  