code: @BetaApi
    public final ListRegionOperationsPagedResponse listRegionOperations(String region) {
      ListRegionOperationsHttpRequest request =
          ListRegionOperationsHttpRequest.newBuilder().setRegion(region).build();
      return listRegionOperations(request);
    }
docs: Retrieves a list of Operation resources contained within the specified region.
  
  <p>Sample code:
  
  <pre><code>
  try (RegionOperationClient regionOperationClient = RegionOperationClient.create()) {
  ProjectRegionName region = ProjectRegionName.of("[PROJECT]", "[REGION]");
  for (Operation element : regionOperationClient.listRegionOperations(region.toString()).iterateAll()) {
  // doThingsWith(element);
  }
  }
  </code></pre>
  
  @param region Name of the region for this request.
  @throws com.google.api.gax.rpc.ApiException if the remote call fails