docs: @BetaApi
    public final Operation patchInterconnectAttachment(
        ProjectRegionInterconnectAttachmentName interconnectAttachment,
        InterconnectAttachment interconnectAttachmentResource,
        List<String> fieldMask) {
  
      PatchInterconnectAttachmentHttpRequest request =
          PatchInterconnectAttachmentHttpRequest.newBuilder()
              .setInterconnectAttachment(
                  interconnectAttachment == null ? null : interconnectAttachment.toString())
              .setInterconnectAttachmentResource(interconnectAttachmentResource)
              .addAllFieldMask(fieldMask)
              .build();
      return patchInterconnectAttachment(request);
    }