inverse method

@override EditOperation inverse()

Create the inverse operation for undo

Implementation

@override
EditOperation inverse() {
  return DeleteOperation(
    offset: offset,
    text: text,
    selectionBefore: selectionAfter,
    selectionAfter: selectionBefore,
    multiCursorsBefore: multiCursorsAfter,
    multiCursorsAfter: multiCursorsBefore,
  );
}