anchor.diff:      return await new Stream.fromIterable(
               projectGraph.depthFirst.map((JefeProject pd) async {
         if (filter(pd)) {
  -        return await command.process(pd, dependencies: pd.directDependencies);
  +        return await command.process(pd);
         }
       }).toList())
           .asyncMap((result) => result)
  
positive.code:       return await _executeOnConcurrentProjects(
            await _projectGroup.rootJefeProjects, command, filter);
      } else {
        return await _processDependenciesDepthFirst(
            (JefeProject project) async {
          if (_filter(project)) {
            return await command.process(project);
          }
  
negative.code:     }
      final jefeProject = jefeProjectOpt.get();
  
      return await command.process(jefeProject);
    }
  
    Future executeOnGraph(ProjectDependencyGraphCommand command,
  