code: public ItemRequest<Task> addFollowers(String task) {
      
          String path = String.format("/tasks/%s/addFollowers", task);
          return new ItemRequest<Task>(this, Task.class, path, "POST");
      }
docs: Adds each of the specified followers to the task, if they are not already
  following. Returns the complete, updated record for the affected task.
  
  @param  task The task to add followers to.
  @return Request object