code: function _isWelcomeProjectPath(path, welcomeProjectPath, welcomeProjects) {
          if (path === welcomeProjectPath) {
              return true;
          }
  
          // No match on the current path, and it's not a match if there are no previously known projects
          if (!welcomeProjects) {
              return false;
          }
  
          var pathNoSlash = FileUtils.stripTrailingSlash(path);  // "welcomeProjects" pref has standardized on no trailing "/"
          return welcomeProjects.indexOf(pathNoSlash) !== -1;
      }
docs: Returns true if the given path is the same as one of the welcome projects we've previously opened,
  or the one for the current build.
  
  @param {string} path Path to check to see if it's a welcome project
  @param {string} welcomeProjectPath Current welcome project path
  @param {Array.<string>=} welcomeProjects All known welcome projects