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

info -- a g:app-info instance
content-type -- a string with 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.