internal static extern Status GetSelectionAtIndex(
     PlaintextBallotContestHandle handle,
     ulong index,
     out PlaintextBallotSelection.PlaintextBallotSelectionHandle selection);
 internal static extern Status GetObjectId(
     PlaintextBallotContestHandle handle, out IntPtr object_id);
 internal static extern ulong GetSelectionsSize(
     PlaintextBallotContestHandle handle);
 internal static extern Status Free(PlaintextBallotContestHandle handle);