If end is negative, or greater than the number of children of list , it's assumed to be exactly the number of elements. If start is greater than or equal to end , nothing is done. Selects the child number item of the list . Nothing happens if item is out of bounds. Unselects the child number item of the list .
Nothing happens if item is out of bounds.
Selects the given child . Unselects the given child . Searches the children of list for the index of child . Set the list selection mode. Zero or one element may be selected.