public static bool Is5 <T1, T2, T3, T4, T5, T6, T7, T8>(this IOrType <T1, T2, T3, T4, T5, T6, T7, T8> self, out T5 t5)
{
if (self.Possibly5() is IIsDefinately <T5> definate)
{
t5 = definate.Value;
return(true);
}
t5 = default;
return(false);
}
