code: function verifyOptions(options) {
  	if (!pa11y.allowedStandards.includes(options.standard)) {
  		throw new Error(`Standard must be one of ${pa11y.allowedStandards.join(', ')}`);
  	}
  	if (options.page && !options.browser) {
  		throw new Error('The page option must only be set alongside the browser option');
  	}
  }
docs: Verify that passed in options are valid.
  @private
  @param {Object} [options={}] - The options to verify.
  @returns {Undefined} Returns nothing.
  @throws {Error} Throws if options are not valid.