text: const openCensusDefaulMetrics = require('../index');
  openCensusDefaulMetrics.collectDefaultMetrics({ timeout: 1000, prefix: 'MyPrefix_' });
  
  const { PrometheusStatsExporter } = require('@opencensus/exporter-prometheus');
  const exporter = new PrometheusStatsExporter({
  	port: 9464,
  	startServer: true
  });
  
  openCensusDefaulMetrics.stats.registerExporter(exporter);
  