private Object getDataSource() {
		if (model instanceof GDynamicColumnTableModel) {
			return ((GDynamicColumnTableModel<?, ?>) model).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 table's data source or null if the table doesn't have one.
Ghidra/Framework/Docking/src/main/java/docking/widgets/table/columnfilter/ColumnBasedTableFilter.java