anchor.diff:  
   %% -----------------------------------------------------------------------------------------
   
  --spec requestResources( Requests :: [ #'Request'{} ]) 
  -                    -> {ok, driver_running } 
  +-spec requestResources( Requests :: [ #'Request'{} ]) -> 
  +                      {ok, driver_running } 
                       | {error, scheduler_not_inited} 
                       | {error, {invalid_or_corrupted_parameter, request_array}}
                       | {error, driver_state()}.
  
positive.code: %% -----------------------------------------------------------------------------------------
  
  -spec launchTasks(  OfferId :: #'OfferID'{}, 
                      TaskInfos :: [ #'TaskInfo'{}]) 
                      -> {ok, driver_running } 
                      | {error, scheduler_not_inited} 
                      | {error, {invalid_or_corrupted_parameter, offer_id}}
                      | {error, {invalid_or_corrupted_parameter, task_info_array}}
  
negative.code: 
  %% -----------------------------------------------------------------------------------------
  
  -spec declineOffer( OfferId :: #'OfferID'{}) -> 
                        {ok, driver_running } 
                      | {error, scheduler_not_inited} 
                      | {error, {invalid_or_corrupted_parameter, offer_id}}
                      | {error, driver_state()}.
  