How to substract a day/hour/minute from joda-time DateTime in Scala?

Question

I am trying to use joda-time with its Scala wrapper.

Saying val dt is a DateTime and contains a date (zero time), how do I get

Answer 1

Seems to be a bug of NetBeans IDE. It shows the error, while compiler compiles ok and the program works as expected with "dt - 1.days" syntax.