Missing methods in package

[syeds-git]

I tried following two packages:
firebase_mlvision:
git:
url: git://github.com/rishab2113/firebase_mlvision.git
AND
firebase_livestream_ml_vision: ^1.0.1
both did not have "instance" under FirebaseVision. I found another package that does have "instance" but it does not have the method visionEdgeImageLabeler(...).
Have I missed something?