code: public UBench addIntTask(String name, IntSupplier task) {
          return addIntTask(name, task, null);
      }
docs: Include an int-specialized named task in to the benchmark.
  
  @param name
  The name of the task. Only one task with any one name is
  allowed.
  @param task
  The task to perform
  @return The same object, for chaining calls.