to_key_file

Description:

public void to_key_file (KeyFile key_file, string? group_name)

This function adds the print settings from this to key_file.

this	a `GtkPrintSettings`
key_file	the `GKeyFile` to save the print settings to
group_name	the group to add the settings to in `key_file`, or null to use the default “Print Settings”