// spanningDataProvider.addAutoSpanningRowPositions(0, 1, 2);
// spanningDataProvider.addAutoSpanningRowPositions(2, 3, 4);
// spanningDataProvider.addAutoSpanningRowPositions(0, 1, 3, 4);
NatTable natTable = new NatTable(parent,
new ViewportLayer(new SelectionLayer(new SpanningDataLayer(
spanningDataProvider))), false);
natTable.addConfiguration(new DefaultNatTableStyleConfiguration());
natTable.addConfiguration(new BodyMenuConfiguration(natTable,