void datasource_gps_clean_up ( gpointer user_data );
gchar* datasource_gps_get_protocol ( gpointer user_data );
gchar* datasource_gps_get_descriptor ( gpointer user_data );
gboolean datasource_gps_get_do_tracks ( gpointer user_data );
void datasource_gps_clean_up ( gpointer user_data );
gchar* datasource_gps_get_protocol ( gpointer user_data );
gchar* datasource_gps_get_descriptor ( gpointer user_data );
gboolean datasource_gps_get_do_tracks ( gpointer user_data );