Returns the URL to the directory of the theme root.
This is typically the absolute URL to wp-content/themes. This forms the basis for all other URLs returned by WP_Theme, so we pass it to the public function get_theme_root_uri() and allow it to run the ‘theme_root_uri’ filter.
(string) Theme root URI.
} /** * Returns the main screenshot file for the theme. * * The main screenshot is called screenshot.png. gif and jpg extensions are also allowed.