Is your feature request related to a problem? Please describe.
When using part directives in Dart, Dart-Code offers one of my favorite quick fix features with Create file '<path>'. The file is created as expected, but doesn't populate the part of ; directive in the created file.

First file: foo.dart

part 'bar.dart';

Created file: bar.dart

part of ; // not filled

Describe the solution you'd like
When using the 'Create file' quick fix feature, the created file should be populated with the relative path of the source file.

First file: foo.dart

part 'bar.dart';

Created file: bar.dart

part of 'bar.dart';

Describe alternatives you've considered
As far as I've noticed, the feature only produces with the "unfilled" path behavior.

Additional context

Current behavior:

Desired behavior: