Thanks again for the remove @unlinked feature.
It works great.
Testing it, I figured out a few (non blocking) edge cases I put here for the record :
Cannot find color #0000002 (or another number) if some sub elements are not linked:
@startuml
[c]
together t{
together x {
[b]
}
}
[c] -> [a]
remove @unlinked
@enduml