question: public void addAll ( T ... items ) { if ( mEventDelegate != null ) mEventDelegate . addData ( items == null ? 0 : items . length ) ; if ( items != null && items . length != 0 ) { synchronized ( mLock ) { Collections . addAll ( mObjects , items ) ; } } if ( mNotifyOnChange ) notifyDataSetChanged ( ) ; }
target:  Adds the specified items at the end of the array.