See here for details: https://developers.google.com/webmaster-tools/v3/sitemaps
The URL of the website to get sitemap information from. Must include protocol (http://).
A list of two dataframes: $sitemap with general info and $contents with sitemap info.
Other data fetching functions:
Add the following code to your website.
For more information on customizing the embed code, read Embedding Snippets.