add_file_aux_argument

Description:

[ Version ( since = "3.0" ) ]
public void add_file_aux_argument (string name, string nick, string? blurb, FileChooserAction action, bool none_ok, File? default_file, ParamFlags flags)

Add a new File auxiliary argument to this.

this	The Procedure.
name	The name of the argument to be created.
nick	The label used in `GimpProcedureDialog`.
blurb	A more detailed help description.
action	The type of file to expect.
none_ok	Whether null is allowed.
default_file	File to use if none is assigned.
flags	Argument flags.