/// <summary>
/// Gets the extension of a path atom.
/// </summary>
/// <returns>A new path atom containing the extension.</returns>
public PathAtom GetExtension(StringTable table)
{
Contract.RequiresNotNull(table);
Contract.Requires(IsValid);
StringId newId = table.GetExtension(StringId);
return(newId.IsValid ? new PathAtom(newId) : Invalid);
}
