Currently, the only way to export a face to DXF via the API is by using the API to select the face, and then executing the "GeomToDXFCommand" command definition. This is not a "pure API" solution, which is not ideal and can cause problems (particularly if errors occur). However, even worse than that, it also provides no control over the important export options (file version and layers) that we get when exporting a face manually.
Please provide a true API mechanism for exporting a particular Face object to DXF, with control over export options such as file version and layers.