code: def mirror_x(clip, apply_to="mask"):
      """Flips the clip horizontally (and its mask too, by default)."""
      return clip.image_transform(
          lambda img: img[:, ::-1], apply_to=apply_to
      )
  
label_desc: Use image node_id 1 for calling a global function with example usage: mirror_x(clip, apply_to) and returns: clip