code: @BetaApi
    public final ListRegionCommitmentsPagedResponse listRegionCommitments(String region) {
      ListRegionCommitmentsHttpRequest request =
          ListRegionCommitmentsHttpRequest.newBuilder().setRegion(region).build();
      return listRegionCommitments(request);
    }
docs: Retrieves a list of commitments contained within the specified region.
  
  <p>Sample code:
  
  <pre><code>
  try (RegionCommitmentClient regionCommitmentClient = RegionCommitmentClient.create()) {
  ProjectRegionName region = ProjectRegionName.of("[PROJECT]", "[REGION]");
  for (Commitment element : regionCommitmentClient.listRegionCommitments(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