UF_BREP_ask_geometry extraction mappings, i.e., specifies conversion
of geometry in an NX body to the geometry the caller receives.

(source[i] corresponds to extracted[i] to form a mapping pair)

For now, the extracted types can only be B-surfaces and B-curves.
Furthermore, two required mappings are:
source[] extracted[]
-------- -----------
UF_BREP_BLEND_GEOM UF_BREP_BSURFACE_GEOM
UF_BREP_INTERSECTION_GEOM UF_BREP_SPLINE_GEOM