code: function toJSType(config) {
      //config.XXX is either undefined or string
    var falsyNotations = ['false', '0', undefined];
    if (!config.enabled || falsyNotations.indexOf(config.enabled.toLowerCase()) >= 0) {
      config.enabled = false;
    } else {
      config.enabled = true;
    }
    config.port = config.port ? parseInt(config.port, 10) : undefined;
    return config;
  }
docs: Transfer the resolved configuration value to proper types: port as number, enabled
  as boolean and clientId as string. The 'enabled' flag is valued to false when set
  to 'false' or '0'.
  @param {object} resolved client side monitoring config
  @api private