code: function _setProjectSettingsFile(settingsFile) {
          projectDirectory = FileUtils.getDirectoryPath(settingsFile);
          _toggleProjectScope();
          PreferencesImpl.projectPathLayer.setPrefFilePath(settingsFile);
          PreferencesImpl.projectStorage.setPath(settingsFile);
      }
docs: @private
  
  This is used internally within Brackets for the ProjectManager to signal
  which file contains the project-level preferences.
  
  @param {string} settingsFile Full path to the project's settings file