docs: @BetaApi
    public final Operation createSnapshotDisk(
        ProjectZoneDiskName disk, Boolean guestFlush, Snapshot snapshotResource) {
  
      CreateSnapshotDiskHttpRequest request =
          CreateSnapshotDiskHttpRequest.newBuilder()
              .setDisk(disk == null ? null : disk.toString())
              .setGuestFlush(guestFlush)
              .setSnapshotResource(snapshotResource)
              .build();
      return createSnapshotDisk(request);
    }