def fields_put.tracked
import bend-kit-http@0.38.2.0/http.bend as Httpimport Base
310def fields_put.tracked(+m: Map<&2, List<&2, String>>, +k: String, v: String, t: Bool) -> Fields:
311 match t:
312 case True{}:
313 fields_put.dup(m, k, v, has_header(m, k))
314 case False{}:
315 FieldsOk{add(m, k, v)}