if I have ``` class ServiceA(dep1 : ComplexSvc, d...

# language-proposals

[groostav]

if I have

class ServiceA(dep1 : ComplexSvc, dbFacade : FancyDBFacade){

  solveDomainProblem(whatever : Whatever): Double{}

  class Null : ServiceA(ComplexSvc.NullInstance, FancyDBFacade.NullInstance){
    //override 
  }
}