How to use the chromedriver.stop function in chromedriver

async teardown() {
    await super.teardown()
    if (this.server) this.server.close()
    if (browser) {
      // Close all remaining browser windows
      try {
        const windows = await browser.windowHandles()
        for (const window of windows) {
          if (!window) continue
          await browser.window(window)
          await browser.origClose()
          await browser.quit()
        }
      } catch (_) {}
    }
    chromedriver.stop()
  }
}

function clean(cb) {
  console.log('I - SETUP CLEAN');
  chromedriver.stop();
  process.exit(0);
}

function stopBrowser() {
        driver.quit();
        chromedriver.stop();
    }

run() {
        var driver = this.startBrowser(this.browser);
        for (let targetDate of this.dates) {
            this.retrieveFlightData(driver, this.from, this.to, targetDate, this.timeoutTime, this.database, this.collection, this.port);
        }
        driver.quit();
        chromedriver.stop();
    }
}

    .on('end', () => crdv.stop());
});

    .on('end', () => crdv.stop());
});