plantuml use mindmap-style arrows in other diagrams

Question

I would like to use mindmap style arrows in non-mindmap diagrams.

example:

@startuml
left to right direction

object o1
object o2
object o3

o1 --> o2
o1 --> o3
@enduml

gives me:

Which works.

But I like the arrow style from the mindmap better:

@startmindmap
* O1
** O2
** O3
@endmindmap

Which gives me:

So, the arrows to the sub-components start from the same position, then branch out, and are curved.

I can't seem to find in the documentation how I can choose this arrow style. Is it even possible?