Method XbpMLE():clear() Foundation
Deletes all of the characters in the edit buffer.
:clear() --> nDeletedChars
This method returns a numeric value indicating the number of characters deleted.
The method :clear() deletes the edit buffer of the XbpMLE object and replaces it with a null string (""). The deleted characters can be copied back into the buffer using the method :undo() as long as no new characters have been entered.
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