struct A
{
int inside_a;
}
struct B
int inside_b;
struct One(T)
T value_t;
One!T one_t;
struct Two(T, U)
U value_u;
void main()
auto from_auto_one = One!A();
auto from_auto_two = Two!(A, B)();
from_auto_one.
from_auto_two.