See the documentation for MirrorsUsed.symbols, MirrorsUsed.targets, MirrorsUsed.metaTargets and MirrorsUsed.override for documentation of the parameters.
const MirrorsUsed(
    {this.symbols, this.targets, this.metaTargets, this.override});
    © 2012 the Dart project authors
Licensed under the Creative Commons Attribution-ShareAlike License v4.0.
    https://api.dart.dev/stable/2.5.0/dart-mirrors/MirrorsUsed/MirrorsUsed.html