code: def check_dependencies(model, model_queue, avaliable_models):
      
      # A list of allowed links: existing fields, itself and the special case ContentType
      allowed_links = [m.model.__name__ for m in model_queue] + [model.__name__, 'ContentType']
  
      # For each ForeignKey or ManyToMany field, check that a link is possible
  
      for field in model._meta.fields:
          if not field.remote_field:
              continue
          if field.remote_field.model.__name__ not in allowed_links:
              if field.remote_field.model not in avaliable_models:
                  continue
              return False
  
      for field in model._meta.many_to_many:
          if not field.remote_field:
              continue
          if field.remote_field.model.__name__ not in allowed_links:
              return False
  
      return True
docs: Check that all the depenedencies for this model are already in the queue.