public final OperationFuture<GetStreamThumbnailResponse, OperationMetadata>
      getStreamThumbnailAsync(GetStreamThumbnailRequest request) {
    return getStreamThumbnailOperationCallable().futureCall(request);
  }
Gets the thumbnail (image snapshot) of a single Stream.

<p>Sample code:

<pre>{@code
// This snippet has been automatically generated and should be regarded as a code template only.
// It will require modifications to work:
// - It may require correct/in-range values for request initialization.
// - It may require specifying regional endpoints when creating the service client as shown in
// https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
try (StreamsServiceClient streamsServiceClient = StreamsServiceClient.create()) {
  GetStreamThumbnailRequest request =
      GetStreamThumbnailRequest.newBuilder()
          .setStream("stream-891990144")
          .setGcsObjectName("gcsObjectName-1987275551")
          .setEvent("event96891546")
          .setRequestId("requestId693933066")
          .build();
  GetStreamThumbnailResponse response =
      streamsServiceClient.getStreamThumbnailAsync(request).get();
}
}</pre>

@param request The request object containing all of the parameters for the API call.
@throws com.google.api.gax.rpc.ApiException if the remote call fails
java-visionai/google-cloud-visionai/src/main/java/com/google/cloud/visionai/v1/StreamsServiceClient.java