It was extremely poorly handled by the Angular Dart team and I learned the hard way that the “source code open to public” != “open source, contributions welcome”.
I really wanted to use Dart over the JS ecosystem (it’s similar to TypeScript syntactically but with a package manager that’s not npm and none of the JS implementation baggage!) but the project is very clearly catering to internal customers at google with 0 care for any sort of community.
I should emphasize that all my contributions were fixes and not some sort of feature requests - the latter would be straight up impossible to discuss I am sure.
Good luck to both the Dart VM and Flutter team - solid engineering from what I can see, just a pity that community management was shit and put me off unless I get paid to work with them.