def write_chains
import bend-prot@0.1.0.0/pdb.bend as Pdbimport Base
import bend-prot@0.1.0.0/protein.bend as P
605def write_chains(cs: List<&2, P.Chain>) -> List<&2, String>:
606 match cs:
607 case Nil{}:
608 Nil{}
609 case h <> t:
610 append_lines(write_chain(h), write_chains(t))