public boolean add(@NonNull final T object) {
        boolean result = mItems.add(object);
        notifyDataSetChanged();
        return result;
    }
public boolean add(@NonNull final T object) {
        boolean result = mItems.add(object);
        notifyDataSetChanged();
        return result;
    }
public boolean add ( @ NonNull final T object ) { boolean result = mItems . add ( object ) ; notifyDataSetChanged ( ) ; return result ; }
Appends the specified element to the end of the {@code List}.

@param object the object to add.

@return always true.
Appends the specified element to the end of the { @code List } .