def flatten_chains_extend
import bend-prot@0.1.0.0/protein.bend as Proteinimport Base
170def flatten_chains_extend(
171 h: Chain, rest: List<&2, Residue>
172) -> List<&2, Residue>:
173 match h:
174 case Chain{cid, residues}:
175 append_residues(residues, rest)