public static bool Is8 <T1, T2, T3, T4, T5, T6, T7, T8>(this IOrType <T1, T2, T3, T4, T5, T6, T7, T8> self, out T8 t8)
{
if (self.Possibly8() is IIsDefinately <T8> definate)
{
t8 = definate.Value;
return(true);
}
t8 = default;
return(false);
}
