findAssets method
Returns all readable assets matching glob
under the current package.
Implementation
@override
Stream<AssetId> findAssets(Glob glob, {String? package}) {
package ??= rootPackage;
if (package == null) {
throw UnsupportedError(
'Root package is required to use findAssets without providing an '
'explicit package.');
}
return Stream.fromIterable(assets.keys
.where((id) => id.package == package && glob.matches(id.path)));
}