In theory, we could probably shake out assets (e.g. fonts, images) from packages that a user isn't using.

In practice, this is actually pretty hard because of the way strings are used in this and level of detection we can use when assets are used dynamically (e.g. get the name of an asset to show from your service, then show it).

This is difficult even for icon fonts, because if you don't have a const reference to the font using IconData, we may not know if you're using it as a regular font or not.

Today, the work around is to just not use packages that have assets you do not need - or, to re-package them to your liking before shipping thea pp.

See also: b/146889328