Dispose this object.
Get the children of element or root if no element is passed.
Optionalelement: CalendarItemThe element from which the provider gets children. Can be undefined.
Children of element or root if no element is passed.
Get TreeItem representation of the element
The element for which TreeItem representation is asked for.
TreeItem representation of the element.
An optional event to signal that an element or root has changed. This will trigger the view to update the changed element/root and its children recursively (if shown). To signal that root has changed, do not pass any argument or pass
undefinedornull.