final DesignTimeDataSchemaModel dataSchemaModel = new DesignTimeDataSchemaModel(report);
final RelationalReportBuilder builder = new RelationalReportBuilder(dataSchemaModel);
builder.addGroup(ROW_DIMENSION_A);
builder.addGroup(ROW_DIMENSION_B);
builder.addDetails(VALUE, aggFun, VALUE_BACKGROUND);
builder.addDetails("row-a-sum", null, ROWA_BACKGROUND);
builder.addDetails("#row-a-sum", null, ROWA_VALIDATE_BACKGROUND);
builder.addDetails("row-b-sum", null, ROWB_BACKGROUND);
builder.addDetails("#row-b-sum", null, ROWB_VALIDATE_BACKGROUND);
builder.addDetails("no-group", null, ROWC_BACKGROUND);
builder.addDetails("#no-group", null, ROWC_VALIDATE_BACKGROUND);