code: def from_api_repr(cls, resource):
          
          entry = resource.copy()
          role = entry.pop("role", None)
          entity_type, entity_id = entry.popitem()
          if len(entry) != 0:
              raise ValueError("Entry has unexpected keys remaining.", entry)
          return cls(role, entity_type, entity_id)
docs: Factory: construct an access entry given its API representation
  
          Args:
              resource (Dict[str, object]):
                  Access entry resource representation returned from the API
  
          Returns:
              google.cloud.bigquery.dataset.AccessEntry:
                  Access entry parsed from ``resource``.
  
          Raises:
              ValueError:
                  If the resource has more keys than ``role`` and one additional
                  key.