code: public ItemRequest<Task> addDependents(String task) {
      
          String path = String.format("/tasks/%s/addDependents", task);
          return new ItemRequest<Task>(this, Task.class, path, "POST");
      }
docs: Marks a set of tasks as dependents of this task, if they are not already
  dependents. *A task can have at most 30 dependents.*
  
  @param  task The task to add dependents to.
  @return Request object