Something like ADL from C++?

[Kagamin]

```
void serialize(byte[] o, string s){}

struct MyDto
{
	struct SerializerAspect
	{
		static void serialize(byte[] o, MyDto s){}
	}
}

void serialize2(T)(byte[] o, T s) if(!is(T.SerializerAspect))
{
	serialize(o,s);
}

void serialize2(T)(byte[] o, T s) if(is(T.SerializerAspect))
{
	T.SerializerAspect.serialize(o,s);
}

void test()
{
	byte[] o;
	string a;
	serialize2(o,a);
	MyDto c;
	serialize2(o,c);
}
```