gio:application-open (application files &optional hint)

application -- a g:application instance
files -- a list of strings for the file names
hint -- an optional string for a hint or the default empty string ""

This results in the "open" signal being emitted in the primary instance. The hint argument is simply passed through to the "open" signal. It is intended to be used by applications that have multiple modes for opening files, for example, "view" versus "edit". Unless you have a need for this functionality, you should use an empty string "".

The application must be registered before calling this function and it must have the :handles-open flag set.