anchor.diff:    joinFile(flutterProjectDir, ['pubspec.yaml'])
         .writeAsStringSync(createPubspec(includeFlutterWeb: true));
     await _runFlutterPubGet(flutterProjectDir);
  +  // TODO(gspencergoog): Convert this to use the flutter recommended lints as
  +  // soon as those are finalized (the current proposal is to leave the
  +  // analysis_options_user.yaml file as-is and replace it with a package, to
  +  // avoid massive breakage).
  +  joinFile(flutterProjectDir, ['analysis_options.yaml']).writeAsStringSync(
  +      'include: package:flutter/analysis_options_user.yaml\n');
   }
   
   Future<void> _runDartPubGet(Directory dir) async {
  
positive.code:   joinFile(dartProjectDir, ['pubspec.yaml'])
        .writeAsStringSync(createPubspec(includeFlutterWeb: false));
    await _runDartPubGet(dartProjectDir);
  
    final flutterProjectPath =
        Directory(path.join(templatesPath.path, 'flutter_project'));
  
negative.code: 
    return content;
  }
  
  String createDartAnalysisOptions() {
    // TODO(gspencergoog): Update this to Dart "recommended" list once that is finalized.
    return '''
  analyzer:
    errors:
      # Increase the severity of some hints.
      - unused_import: warning
  
  linter:
    rules:
      # Ordering lints.
      - directives_ordering
      - sort_pub_dependencies
  
      # All other lints.
      - always_declare_return_types
      - avoid_empty_else
      - avoid_relative_lib_imports
      - avoid_shadowing_type_parameters
      - avoid_types_as_parameter_names
      - await_only_futures
      - camel_case_extensions
      - camel_case_types
      - curly_braces_in_flow_control_structures
      - empty_catches
      - file_names
      - hash_and_equals
      - iterable_contains_unrelated_type
      - list_remove_unrelated_type
      - no_duplicate_case_values
      - non_constant_identifier_names
      - package_prefixed_library_names
      - prefer_generic_function_type_aliases
      - prefer_is_empty
      - prefer_is_not_empty
      - prefer_iterable_whereType
      - prefer_typing_uninitialized_variables
      - provide_deprecation_message
      - unawaited_futures
      - unnecessary_overrides
      - unrelated_type_equality_checks
      - valid_regexps
      - void_checks
  ''';
  }
  