HOW-TO Create colspan headers

Available since version 3.2.1

The idea is have a column span header, like html tables.

For example:

State Estimated
Amount Percentage
Arizona 600 30%
New York 400 20%
Florida 1000 50%

In the following example, we are adding a colum span in the header of the column 2 to the column 3:

DynamicReportBuilder drb = new DynamicReportBuilder();
...
AbstractColumn columnPercentageAmount = ColumnBuilder.getNew()
        .setPercentageColumn((PropertyColumn) columnAmount)
        .setTitle("Amount [%]").setWidth(new Integer(90))
        .setStyle(amountStyle).setHeaderStyle(headerStyle).build();
...
drb.addColumn(columnState);
drb.addColumn(columnBranch);
drb.addColumn(columnaItem);
drb.addColumn(columnaCantidad);
drb.addColumn(columnAmount);
drb.addColumn(columnPercentageAmount)
//Here set the colspan.
dbr.setColspan(2, 2, "Estimated");
...

NOTE: You may add first the cols after set the colspan.

Refer to ColumnsSpanTest for a working example.
The result is similar to:
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