anchor.diff:  
   === Exclude Potential Owner from a Human Task
   
  -You can prevent a potential owner of a task from becoming the actual owner. When you exclude potential owners from a human task, they can not claim and act on it, nor can they view it in their task list. 
  +You can prevent a potential owner of a task from becoming the actual owner. When you exclude potential owners from a human task, they can not claim and act on it, nor can they view it in their task list.
   To exclude users from a human task, set the task input variable with name `ExcludedOwnerId` to the name of the user you wish to exclude from the potential owner list. For this, ensure that the human task is assigned to a group. To exclude multiple owners from a human task, set the `ExcludedOwnerId` parameter to a comma separated list of values.
   
   The following BPMN process shows how to exclude a potential owner from a human task:
  
positive.code: 
  You can use the following Java API methods from `UserTaskAdminService` to modify `excludedOwners`:
  
  * `addExcludedOwners()`: To add new excluded owners to a given task. 
  
  * `removeExcludedOwners()`: To remove existing excluded owners from given task.
  
  
negative.code: 
  QueryServicesClient queryClient = kieServicesClient
    .getServicesClient(QueryServicesClient.class);
  
  // Maven dependency list shown above
  ----
  
  