def pos_of_serial
import bend-prot@0.1.0.0/bonded.bend as Bondedimport Base
import bend-prot@0.1.0.0/geom.bend as G
import bend-prot@0.1.0.0/protein.bend as P
27def pos_of_serial(xs: List<&2, P.Atom>, s: U32) -> Maybe<&2, G.Vec3>:
28 pos_of_serial_go(xs, s, None{})