The compression type.
The file's encoding.
The #GtkSourceFile. The #GtkSourceFileSaver object has a weak reference to the file.
File saving flags.
The #GFile where to save the buffer. By default the location is taken from the #GtkSourceFile at construction time.
The newline type.
The #GtkSourceBuffer to save. The #GtkSourceFileSaver object has a weak reference to the buffer.