Removes some portion of the sequence.
Returns:
If the implementation supports a history mechansim,
a reference to an Edit implementation will be returned,
otherwise null.
Parameters:
-
where - The offset into the sequence to make the
insertion >= 0.
-
nitems - The number of items in the sequence to remove >= 0.
Throws:
-
BadLocationException - Thrown if the area covered by
the arguments is not contained in the character sequence.