[records] A reflection API to get the primary constructor?

[Tagir Valeev]

Hello!

Speaking of the reflection API, do we have a way to get a primary
constructor of a record class? Sure we can do something like

cls.getConstructor(Arrays.stream(cls.getRecordAccessors()).map(Method::getReturnType).toArray())

But it looks like a bit verbose. Something like
cls.getPrimaryConstructor() (throwing on non-records) looks better.
What do you think?

With best regards,
Tagir Valeev.