question: this method is not in use , and will throw an unsupportedoperationexception . concode_field_sep HandlerRegistration selectionHandler concode_elem_sep SelectionModel<? super T> selectionModel concode_elem_sep Set<T> selectedRows concode_elem_sep TaskDisplayView<T> view concode_elem_sep TaskDisplay<T> display concode_elem_sep List<? extends T> rowData concode_field_sep boolean isRowCountExact concode_elem_sep int getRowCount concode_elem_sep List<? extends T> getRowData concode_elem_sep SelectionModel<? super T> getSelectionModel concode_elem_sep void fireEvent concode_elem_sep HandlerRegistration addRangeChangeHandler concode_elem_sep void scrollToItem concode_elem_sep void updateSelection concode_elem_sep void redraw concode_elem_sep Range getVisibleRange concode_elem_sep void bind concode_elem_sep void setSelectionModel concode_elem_sep void setVisibleRange concode_elem_sep void setVisibleRange concode_elem_sep void setVisibleRangeAndClearData concode_elem_sep void setRowCount concode_elem_sep void setRowCount concode_elem_sep void clearSelectionModel concode_elem_sep void setRowData
target: HandlerRegistration function ( RowCountChangeEvent . Handler arg0 ) { throw new UnsupportedOperationException ( ) ; }