code: function() {
        // Instantiate the parsers; this will register handlers for known events
        var allTypeInfos = tr.e.importer.linux_perf.
            Parser.getAllRegisteredTypeInfos();
        var parsers = allTypeInfos.map(
            function(typeInfo) {
              return new typeInfo.constructor(this);
            }, this);
  
        return parsers;
      }
docs: Creates an instance of each registered linux perf event parser.
  This allows the parsers to register handlers for the events they
  understand.  We also register our own special handlers (for the
  timestamp synchronization markers).