Object getDataSource() {
		if (tableModel instanceof GDynamicColumnTableModel) {
			return ((GDynamicColumnTableModel<?, ?>) tableModel).getDataSource();
		}
		return null;
	}
Gets the table's DataSource (if it has one. Only table models that extends 
{@link GDynamicColumnTableModel} can have a data source

@return the data source
Ghidra/Framework/Docking/src/main/java/docking/widgets/table/constraint/dialog/ColumnFilterDialogModel.java