docs: function PowerParser(importer) {
      Parser.call(this, importer);
  
      // NB: old-style power events, deprecated
      importer.registerEventHandler('power_start',
          PowerParser.prototype.powerStartEvent.bind(this));
      importer.registerEventHandler('power_frequency',
          PowerParser.prototype.powerFrequencyEvent.bind(this));
  
      importer.registerEventHandler('cpu_frequency',
          PowerParser.prototype.cpuFrequencyEvent.bind(this));
      importer.registerEventHandler('cpu_idle',
          PowerParser.prototype.cpuIdleEvent.bind(this));
    }