Tree shaking requires @staticIconProvider annotation

[ltOgt]

Had an issue where Font awesome icons were not reduced by tree shaking:

Turns out you need to add the @staticIconProvider annotation

Compare

• flutters Icons with annotation: https://github.com/flutter/flutter/blob/e1e47221e86272429674bec4f1bd36acc4fc7b77/packages/flutter/lib/src/material/icons.dart#L153
• font awesomes FontAwesomeIcons without annotation: https://github.com/fluttercommunity/font_awesome_flutter/blob/32beff2ea1156d62d0c2130b8202b88a9724508f/lib/font_awesome_flutter.dart#L11

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https://github.com/fluttercommunity/font_awesome_flutter/blob/32beff2ea1156d62d0c2130b8202b88a9724508f/util/lib/main.dart#L345

[michaelspiss]

Hey @ltOgt, thanks for bringing this up! @staticIconProvider will be available with the next release