def h2.header.has
import bend-kit-http@0.38.2.0/http.bend as Httpimport Base
3159def h2.header.has(xs: List<&2, String>, +key: String) -> Bool:
3160 match xs:
3161 case Nil{}:
3162 False{}
3163 case Con{value, rest}:
3164 Bool.or(String.eq(String.to_lower(trim(value)), key), h2.header.has(rest, key))