gio:app-info-set-as-last-used-for-type (appinfo ctype)

appinfo -- a g:app-info instance
ctype -- a string for the content type

True on success, false on error.

Sets the application as the last used application for a given content type. This will make the application appear as first in the list returned by the g:app-info-recommended-for-type function, regardless of the default application for that content type.