int  column = OS.gtk_tree_view_get_column (parentHandle, index); if (column == 0) return;
public void setText (int index, String string) {	checkWidget ();	if (string == null) error (SWT.ERROR_NULL_ARGUMENT);	if (!(0 <= index && index <= parent.columnCount )) return;	int /*long*/ parentHandle = parent.handle;	int /*long*/ column = OS.gtk_tree_view_get_column (parentHandle, index);	if (column == 0) return;	byte[] buffer = Converter.wcsToMbcs (null, string, true);	int modelIndex = parent.columnCount == 0 ? Table.FIRST_COLUMN : parent.columns [index].modelIndex;	OS.gtk_list_store_set (parent.modelHandle, handle, modelIndex + Table.CELL_TEXT, buffer, -1);	cached = true;}