use_string_in_part_of_directives

Use string in part of directives.

From Effective Dart:

DO use strings in part of directives.

BAD:

part of my_library;

GOOD:

part of '../../my_library.dart';

To enable the use_string_in_part_of_directives rule, add use_string_in_part_of_directives under linter > rules in your analysis_options.yaml file:

linter:
  rules:
    - use_string_in_part_of_directives

If you're instead using the YAML map syntax to configure linter rules, add use_string_in_part_of_directives: true under linter > rules:

linter:
  rules:
    use_string_in_part_of_directives: true