There are some property which are complex composed by java classes (which implement some interfaces), package names, etc

Here some usecase:

log category

See https://quarkus.io/guides/logging#category-example

quarkus.log.category."io.quarkus.smallrye.jwt".level=TRACE
quarkus.log.category."io.undertow.request.security".level=TRACE

In this sample,we should have completion for package names (after category) and validation.

mp rest priority

com.mycompany.remoteServices.MyServiceClient/mprest/providers/com.mycompany.MyProvider/priority = 1

In this sample we should have completion for mp rest provider (after /providers). mp rest provider is a class which implements some interfaces. We should have too definition on this provider class, hover and validation.