How to import HTML fragment into HAML?

Question

HTML

I master HAML for use in layout.
Can't find a way to "import" HTML snippets from individual HTML files into a HAML file. Tell me what to write in the HAML_file so that an HTML fragment from folder/file.html appears on the written text?
(HAML works as part of PrePros (multi-compiler software)).

Answer 1

Why not move everything to HAML? Let's say through converters, for example html2haml.heroku.com ?