[FR]: Asset path as const

[Nico04]

Is there an existing issue for this?

• I have searched the existing issues

Describe the problem

I have several const that defines some static data in my app.
Before using flutter_gen, I could write something like this :
const breath = MultiSelectorItem('breath', 'assets/breath.svg', 'Breath');

But when using flutter_gen, this line doesn't work anymore :
const breath = MultiSelectorItem('breath', Assets.breath.path, 'Breath');

Describe the solution

It seems that it's because the generated class SvgGenImage.path is a getter, so NOT const.

class SvgGenImage {
  const SvgGenImage(this._assetName);

  final String _assetName;

  [...]

  String get path => _assetName;
  String get keyName => _assetName;
}

Do you have an idea how can I use the asset path in a const ?

Additional context

I now I could remove flutter_svg: true in pubspec, but using this kind of code is also handy :
child: Assets.breath.svg()

Request looks similar to #351, but it is somewhat different.

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