getFoldedElements(int index) Returns all elements which are folded together to one entry in the list.
Parameters: index - the index selecting the entry in the list.
Returns all elements which are folded together to one entry in the list.
Parameters: index - the index selecting the entry in the list. returns an array of elements folded together.
Sets the selection referenced by an array of elements.
Empty or null array removes selection.
To be called within open().
Parameters: selection - the indices of the selection.
Sets an optional validator to check if the selection is valid.
The validator is invoked whenever the selection changes.
Parameters: validator - the validator to validate the selection.