anchor.diff:  # conflicts_with 'dart-content-shell-edge', :because => 'installation of dart-dsk tools in path'
           ''' + cs_install_section))
       .catchError((e) {
  -        print("DartContentShellStable: ${e}");     // Finally, callback fires.
  +        print("DartContentShellStable: ${e} ${e.stackTrace}");     // Finally, callback fires.
           return -1;
         })
       .then((_) {
  
positive.code: # conflicts_with 'dart-editor-stable', :because => 'installation of dart-dsk tools in path'
          ''' + dart_install_section))
      .catchError((e) {
          print("DartEditorEdgeCs: ${e}");     // Finally, callback fires.
          return -1;
        })
      .then((_) => writeCask(outputDirectory, "DartEditorStable", "dart-editor-stable.rb", client, stable_root_url, "editor/darteditor-macos-x64.zip",  '''
  
negative.code: # conflicts_with 'dart-editor-edge-cs', :because => 'installation of dart-dsk tools in path'
          ''' + dart_install_section))
      .catchError((e) {
          print("DartEditorStable: ${e} ${e.stackTrace}");     // Finally, callback fires.
          return -1;
        })
      .then((_) => writeCask(outputDirectory, "DartContentShellDev", "dart-content-shell-dev.rb", client, dev_root_url, "dartium/content_shell-macos-ia32-release.zip",  '''
  