Function appendHeader

out/cli.cjs:58424–58444

(headers, name, value)

      } else {
        throw webidl.errors.conversionFailed({
          prefix: "Headers constructor",
          argument: "Argument 1",
          types: ["sequence<sequence<ByteString>>", "record<ByteString, ByteString>"]
        });
      }
    }
    function appendHeader(headers, name, value) {
      value = headerValueNormalize(value);
      if (!isValidHeaderName2(name)) {
        throw webidl.errors.invalidArgument({
          prefix: "Headers.append",
          value: name,
          type: "header name"
        });
      } else if (!isValidHeaderValue(value)) {
        throw webidl.errors.invalidArgument({
          prefix: "Headers.append",
          value,
          type: "header value"
        });
      }
      if (headers[kGuard] === "immutable") {
        throw new TypeError("immutable");
      } else if (headers[kGuard] === "request-no-cors") {