docs: @BetaApi
    public final Operation insertInterconnectAttachment(
        String region, InterconnectAttachment interconnectAttachmentResource) {
  
      InsertInterconnectAttachmentHttpRequest request =
          InsertInterconnectAttachmentHttpRequest.newBuilder()
              .setRegion(region)
              .setInterconnectAttachmentResource(interconnectAttachmentResource)
              .build();
      return insertInterconnectAttachment(request);
    }