cannot handle arbitrary output transform function

if the output_transform function changes the location rather than just putting it into a specific format, one cannot use the corresponding algorithm as input,
since at the time the output transform is applied, we do not update locations of the datahandles that were used as input.

since the output transform function for FilterDesktop and CombineParticles appends /Particles to the output string, its output is currently unusable as input for anything but combineparticles (which also appends /Particles at the C++ side)

How should we proceed here?

1. update inputs when output transforms are applied
2. do not allow for output transforms changing location
3. ?

Its not obvious to me how to do any of these things tbh