public void add(final DLItem item){
  checkWidget();
  if (item == null) {
    SWT.error(SWT.ERROR_NULL_ARGUMENT);
  }
  items.add(item);
  redrawTables();
}

public void add ( final DLItem item ) { checkWidget ( ) ; if ( item == null ) { SWT . error ( SWT . ERROR_NULL_ARGUMENT ) ; } items . add ( item ) ; redrawTables ( ) ; }
adds the argument to the end of the receiver ' s list .
