code: public ItemRequest<Task> addDependencies(String task) {
      
          String path = String.format("/tasks/%s/addDependencies", task);
          return new ItemRequest<Task>(this, Task.class, path, "POST");
      }
docs: Marks a set of tasks as dependencies of this task, if they are not
  already dependencies. *A task can have at most 15 dependencies.*
  
  @param  task The task to add dependencies to.
  @return Request object