how to set version for NIFI customized Processor?

[尹文才]

Hi guys, I have installed NIFI 1.2 and have played with it for a while.
One thing I noticed for 1.2 is that when I placed my previously written
customized Processor
into 1.2, I could see in the Processor select dialog there's a Version
field for each processor
and the value for my processor is unversioned. So does anyone know how to
set version for
customized processor? Thanks.