ingest method
- IngestMessageRequest request,
 - String parent, {
 - String? $fields,
 
Parses and stores an HL7v2 message.
This method triggers an asynchronous notification to any Pub/Sub topic
configured in Hl7V2Store.Hl7V2NotificationConfig, if the filtering matches
the message. If an MLLP adapter is configured to listen to a Pub/Sub
topic, the adapter transmits the message when a notification is received.
If the method is successful, it generates a response containing an HL7v2
acknowledgment (ACK) message. If the method encounters an error, it
returns a negative acknowledgment (NACK) message. This behavior is
suitable for replying to HL7v2 interface systems that expect these
acknowledgments.
request - The metadata request object.
Request parameters:
parent - Required. The name of the HL7v2 store this message belongs to.
Value must have pattern
^projects/\[^/\]+/locations/\[^/\]+/datasets/\[^/\]+/hl7V2Stores/\[^/\]+$.
$fields - Selector specifying which fields to include in a partial
response.
Completes with a IngestMessageResponse.
Completes with a commons.ApiRequestError if the API endpoint returned an error.
If the used http.Client completes with an error when making a REST call,
this method will complete with the same error.
Implementation
async.Future<IngestMessageResponse> ingest(
  IngestMessageRequest request,
  core.String parent, {
  core.String? $fields,
}) async {
  final body_ = convert.json.encode(request);
  final queryParams_ = <core.String, core.List<core.String>>{
    if ($fields != null) 'fields': [$fields],
  };
  final url_ = 'v1/' + core.Uri.encodeFull('$parent') + '/messages:ingest';
  final response_ = await _requester.request(
    url_,
    'POST',
    body: body_,
    queryParams: queryParams_,
  );
  return IngestMessageResponse.fromJson(
      response_ as core.Map<core.String, core.dynamic>);
}