How to define action='store_true' in absl

Question

I am migrating code from argparse to absl (The python version is 3.6). The code using argparse has the following

  parser.add_argument('--flip_left_right', default=False,
  help="flip", action='store_true')

Using absl, I can define the flag with the following code

flags.DEFINE_bool("flip_left_right", False, "flip")

But I cannot define "action" in absl (which will report error "unexpected keyword argument 'action'" if I do so). How can I define the action='store_true' in absl? Thanks a lot!