style: HorizontalAlignment management for diamond [Activity diagram]

Question

Hello PlantUML team,

• Could PlantUML manage HorizontalAlignment for diamond?

@startuml
<style>
activityDiagram {
diamond {
          HorizontalAlignment center
          BackgroundColor #ccf
}
}
</style>
if (a\na a\na a a?) is (red) then
:print red;
else 
:print not red;
@enduml

Thank for your support,
Regards,
Th.