public static bool Is4 <T1, T2, T3, T4, T5, T6, T7, T8>(this IOrType <T1, T2, T3, T4, T5, T6, T7, T8> self, out T4 t4)
{
if (self.Possibly4() is IIsDefinately <T4> definate)
{
t4 = definate.Value;
return(true);
}
t4 = default;
return(false);
}
