I'm using NB 12.4 with JDK 16 and I have been reading a bit of the annotations article from the newest Java Magazine. I thought I'd fiddle with the @Nonnull annotation, so I put one in a method's declaration where I thought it needed to go so I could indicate that a parameter needed a non-null value:
protected boolean checkEqual(@Nonnull SU subscription){
Netbeans complains that it cannot find the symbol @Nonnull, and it does not
give me the option to add an import.
Why does this happen?
