question: private void deselect ( final int index , final boolean shouldFireEvents ) { checkWidget ( ) ; if ( index < 0 || index >= items . size ( ) ) { return ; } final DLItem item = selection . remove ( index ) ; if ( shouldFireEvents ) { fireSelectionEvent ( item ) ; } final List < DLItem > deselectedItems = new ArrayList < DLItem > ( ) ; item . setLastAction ( LAST_ACTION . DESELECTION ) ; deselectedItems . add ( item ) ; if ( shouldFireEvents ) { fireSelectionChangeEvent ( deselectedItems ) ; } redrawTables ( ) ; }
target:  Deselects the item at the given zero-relative index in the receiver. If the item at the index was already deselected, it remains deselected. Indices that are out of range are ignored.