Deserialize a file filter from a glib.variant.VariantG.
The variant must be in the format produced by gtk.file_filter.FileFilter.toGvariant.
an a{sv} glib.variant.VariantG
a new gtk.file_filter.FileFilter object
Deserialize a file filter from a glib.variant.VariantG.
The variant must be in the format produced by gtk.file_filter.FileFilter.toGvariant.