get-region-data in text%

Gets extra data associated with a given region. See Editor Data for more information.

This method is not called when the whole editor is saved to a file. In such cases, the information can be stored in the header or footer; see Global Data: Headers and Footers.

This method is meant to be overridden; the default set-region-data method does not store information to be retrieved by this method.

• (send a-text get-region-data start end) -> editor-data% object or #f
   start : exact non-negative integer
     end : exact non-negative integer