anchor.diff:  class _CommandEntry {
     final String name;
     final String run;
  -  final Map<String, String>? env;
     final String? id;
     final String? ifCondition;
     final String? workingDirectory;
  
positive.code:   _CommandEntry(
      this.name,
      this.run, {
      this.env,
      this.id,
      this.ifCondition,
      this.workingDirectory,
  
negative.code:   Map<String, dynamic> get runContent => {
          if (id != null) 'id': id,
          'name': name,
          if (ifCondition != null) 'if': ifCondition,
          if (workingDirectory != null) 'working-directory': workingDirectory,
          'run': run,
  