gtkFileChooserAddFilter: gtkFileChooserAddFilter
Description
Adds filter to the list of filters that the user can select between.
When a filter is selected, only files that are passed by that
filter are displayed. Usage
gtkFileChooserAddFilter(object, filter)
Details
Note that the chooser takes ownership of the filter, so you have to
ref and sink it if you want to keep a reference.
Since 2.4