[InputBuilder] Fix: Make sure placeholders for substructures are set up properly, even if no acceptable targets have been defined for the parent feature via "Features".
[InputBuilder] Fix: Make sure placeholders for substructures are set up
properly, even if no acceptable targets have been defined for the parent
feature via "Features".

itsjeyd/ODE,itsjeyd/ODE,itsjeyd/ODE,itsjeyd/ODE