How to use the @dynatrace/oneagent-sdk.ChannelType function in @dynatrace/oneagent-sdk

async function tracedOutgoingRemoteCall(method, data) {
  const tracer = Api.traceOutgoingRemoteCall({
    serviceEndpoint: "ChildProcess",
    serviceMethod: method,  // the name of the remote method called
    serviceName: "StringManipulator",
    channelType: Sdk.ChannelType.NAMED_PIPE
  });

  try {
    // start tracer, get dynatrace tag and trigger sending via doOutgoingRemoteCall()
    return await tracer.start(function triggerTaggedRemoteCall() {
      // getting a tag from tracer needs to be done after start()
      const dtTag = tracer.getDynatraceStringTag();
      // now trigger the actual remote call
      return doOutgoingRemoteCall(method, data, dtTag);
    });
  } catch (e) {
    tracer.error(e);
    throw e;
  } finally {
    tracer.end();
  }