Is it still needed to use JvmField annotation for ISSUE instance?

[ganadist]

Hello.

I tried to create my custom line rule.
And I have a question while writing it.

In Creating the issue section, sample code shows that JvmField annotation is using for ISSUE instance.

But in my understand, it seems that JvmField annotation is not required to Registering the issue.

And also, I tried to remove JvmField annotation from SampleCodeDetector of HEAD, but it seems to be worked well at :app:lintDebug task or Android Studio.

Gradle scan output:
https://scans.gradle.com/s/dmijqsoka624a/console-log?page=1#L178

Is it okay to remove JvmField annotation for my custom lint rules?
Or please describe why JvmField annotation is required at Creating the issue section.