def headers
import bend-kit-sigv4@0.11.0.1/sigv4.bend as Sigv4import Base
231def headers(hs: List<&2, Sigma<&2, &2, String, _ => String>>) -> List<&2, Sigma<&2, &2, String, _ => String>>:
232 grp(List.sort(~Sigma<&2, &2, String, _ => String>, ~name.le, hdrs.low(hs)), Nil{})