Which method does gyGeo uses to create final geometry

[Mohsin-Bashir]

Hi i was doing Multidisciplinary Design Optimization using Dafoam https://dafoam.github.io/mydoc_get_started_faq.html#can-i-get-the-optimized-geometry-in-a-cad-format. After we have obtained optimized mesh, how does pyGeo use FFD volume with initial geometry to create final optimized CAD geometry.
After studying the https://github.com/mdolab/pygeo/blob/main/pygeo/pyGeo.py and dvgeo.py files, what i understand is dvgeometry maps the ffd design variables information to initial geometry and then uses the same relationship to find the final geometry given the ffd design variables. Am i right? please guide me, if anyone have information about it.