int newShapeId() {
DrawingManager2 dm = _sheet.getWorkbook().getWorkbook().getDrawingManager();
EscherDgRecord dg =
_boundAggregate.getEscherContainer().getChildById(EscherDgRecord.RECORD_ID);
short drawingGroupId = dg.getDrawingGroupId();
return dm.allocateShapeId(drawingGroupId, dg);
}
/**
* Does this HSSFPatriarch contain a chart?
* (Technically a reference to a chart, since they