How to use a TimestampRange in Jaspersoft Studio ?

Hello everybody !

I am using a DateRange and everything works well, but when I try to do the same with a TimestampRange it doesn't work.

My DateRange : 

new net.sf.jasperreports.types.date.DateRangeBuilder("DAY").toDateRange()

My try in TimestampRange (it doesn't work) :

new net.sf.jasperreports.types.date.DateRangeBuilder("DAY").set(Timestamp.class).toDateRange()

Could someone tell me how to use a TimestampRange in Jaspersoft Studio ? (the same way as a DateRange)