public static bool GroupExists(long groupId, string groupName) => Hdf5Utils.ItemExists(groupId, groupName, Hdf5ElementType.Group);
public static long CreateOrOpenGroup(long groupId, string groupName)
{
return((Hdf5Utils.ItemExists(groupId, groupName, Hdf5ElementType.Group))
? H5G.open(groupId, Hdf5Utils.NormalizedName(groupName))
: H5G.create(groupId, Hdf5Utils.NormalizedName(groupName)));
}