/// <summary>
/// hollow hexagon ring at some origin
/// </summary>
/// <param name="origin"></param>
/// <param name="k"></param>
/// <param name="outCells"></param>
/// <returns></returns>
public static int HexRing(H3Index origin, int k, out List <H3Index> outCells)
{
(int status, List <H3Index> cells) = origin.HexRing(k);
outCells = cells;
return(status);
}
