The contents of the stylesheet.
OptionalsourceThe URL to use to link to the loaded stylesheet's source code in source
maps. A file: URL is ideal because it's accessible to both browsers and
other build tools, but an http: URL is also acceptable.
If this isn't set, it defaults to a data: URL that contains the contents
of the loaded stylesheet.
The syntax with which to parse contents.
The result of successfully loading a stylesheet with an Importer.