supertux_godot/data/images/creatures/dart/dart.sprite

(supertux-sprite
  (action
    (name "flying-left")
    (hitbox 10 12 12 7)
    (images "flying.png")
    )
  (action
    (name "flying-right")
    (hitbox 10 12 12 7)
    (mirror-action "flying-left")
    )
  )