How to export/publish Property in interface?

[JiaAnWei]

Hello all, I am a newbie use this dubs-Java 3.2.3 for jdk8, and can’t find any tutorial to export/publish Property like the busctl view below.

NAME. TYPE. SIGNATURE RESULT/VALUE foo.bar interface - - .helloWorld method - a .IDprop property u 12345

I could only export an interface with helloWorld, but didn’t find any way to add Property to interface. Any one can help? Thank all!