store_delimiters()
Store current AppleScript's text item delimiters to prepare to call text handling routines.
Some class methods of XText change AppleScript's text item delimiters. To avoid affectting other codes, text item delimiters should be stored before calling the handler using store_delimiters() and should be restored after the handler using restore_delimiters().
The handlers which should be called between store_delimiters() and restore_delimiters() have descriptions in own pages.