/// <summary>
/// Reads a unique identifier from <paramref name="source"/> and then 'advances'.
/// </summary>
/// <exception cref="IndexOutOfRangeException">Thrown if the <paramref name="source"/> does not have enough data to read a value of type <typeparamref name="T"/>.</exception>
public static long ReadUniqueId <T>(this IHFormat format, ref ReadOnlySpan <byte> source)
where T : struct
{
long uniqueId = format.ReadUniqueId(source, out int bytesRead);
source = source.Slice(bytesRead);
return(uniqueId);
}