Usage of FileDetector in protractorjs. Uploading file to remote selenium node

filedetector.js

uploadFile(absFilePath) {
    const FileDetector = require('selenium-webdriver/remote/index.js').FileDetector;
    browser.setFileDetector(new FileDetector());

    this.hiddenInputField.sendKeys(absFilePath).then(() => {console.log('Uploading file:', absFilePath)})
    // File upload could take a lot of time. Try to use as small file as possible.
    browser.wait(your_condition_to_wait, 30000);
}