Lint class structure best practices for fields

[keaner]

This is basically an extension of http://dart-lang.github.io/linter/lints/sort_constructors_first.html

It'd be great to lint for fields showing up before constructors.

Good

class MyClass {
  String publicString = 'hello';
  String _privateString;

  const MyClass(this._privateString);

  String get privateString => _privateString;
}

Bad

class MyClass {
  const MyClass(this._privateString);

  String get privateString => _privateString;

  String publicString = 'hello';
  String _privateString;
}

[srawlins]

+1. What are the specifics?

1. First, public static fields
2. Then, private static fields
3. Then, public instance fields
4. Then, private instance fields

Is that right? What about const things? Maybe const doesn't play a role?

Also, I'd strongly suggest not implementing anything about alphabetical order. While that might have benefits, I'd separate it from this ordering lint.

[srawlins]

Closing as a duplicate of #58283, which is newer, but has more discussion.