public static bool Is3 <T1, T2, T3, T4, T5, T6, T7, T8>(this IOrType <T1, T2, T3, T4, T5, T6, T7, T8> self, out T3 t3)
{
if (self.Possibly3() is IIsDefinately <T3> definate)
{
t3 = definate.Value;
return(true);
}
t3 = default;
return(false);
}
