def Headers.add
import bend-trace-context@0.2.0.0/native_http.bend as NativeHttpimport Base
import bend-trace-context@0.2.0.0/trace_context.bend as TC
70# Put one field's value first among its name's values.
71def Headers.add(+headers: HeaderMap(), header: TC.Header) -> HeaderMap():
72 match header:
73 case TC.Header{+name, value}:
74 Map.set(&2, List<&2, String>, headers, name, Con{value, Headers.values(headers, name)})