code: def concatenate(cls, *args: List['ComponentRef']) -> 'ComponentRef':
          
  
          a = copy.deepcopy(args[0])
          n = a
          for b in args[1:]:
              while n.child:
                  n = n.child[0]
              b = copy.deepcopy(b)  # Not strictly necessary
              n.child = [b]
          return a
docs: Helper function to append two component references to eachother, e.g.
          a "within" component ref and an "object type" component ref.
          :return: New component reference, with other appended to self.