[nem-en] Where field initialization expressions copy constructor of type?

[vc]

   Hi,
   
   Where (in compiler code) field initialization expressions copy
constructor of type?
   
   For example, in code:
   public class TestClass
   {
     static some_stack: Stack[string] = Stack();
   }
   
   expression "Stack()" copy to ctor of TestClass. I need finde where is
done.