+/* Only need to define VikTrack and trackname if the file type is FILE_TYPE_GPX_TRACK */
+gboolean a_file_export ( VikTrwLayer *vtl, const gchar *filename, VikFileType_t file_type, const gchar *trackname );
+const gchar *a_get_viking_dir();
+
+void file_write_layer_param ( FILE *f, const gchar *name, guint8 type, VikLayerParamData data );
+