code: def instantiate_all(graph):
      
  
      def should_instantiate(obj):
          classes = [ObjectProxy, dict, list]
          return True in [isinstance(obj, cls) for cls in classes]
  
      if not isinstance(graph, list):
          for key in graph:
              if should_instantiate(graph[key]):
                  graph[key] = instantiate_all(graph[key])
          if hasattr(graph, 'keys'):
              for key in graph.keys():
                  if should_instantiate(key):
                      new_key = instantiate_all(key)
                      graph[new_key] = graph[key]
                      del graph[key]
  
      if isinstance(graph, ObjectProxy):
          graph = graph.instantiate()
  
      if isinstance(graph, list):
          for i, elem in enumerate(graph):
              if should_instantiate(elem):
                  graph[i] = instantiate_all(elem)
  
      return graph
docs: Instantiate all ObjectProxy objects in a nested hierarchy.
  
      Parameters
      ----------
      graph : dict or object
          A dictionary (or an ObjectProxy) containing the object graph
          loaded from a YAML file.
  
      Returns
      -------
      graph : dict or object
          The dictionary or object resulting after the recursive instantiation.