Cleanup: avoid copying the result model unnecessarily, and prevent confusion between "path" in the GeometryPath sense and the absolute-path-string sense.
Cleanup: avoid copying the result model unnecessarily, and prevent confusion between "path" in the GeometryPath sense and the absolute-path-string sense.

opensim-org/opensim-core,opensim-org/opensim-core,opensim-org/opensim-core,opensim-org/opensim-core,opensim-org/opensim-core,opensim-org/opensim-core,opensim-org/opensim-core