code: def from_api_repr(cls, resource):
          
          project = resource["projectId"]
          dataset_id = resource["datasetId"]
          return cls(project, dataset_id)
docs: Factory: construct a dataset reference given its API representation
  
          Args:
              resource (Dict[str, str]):
                  Dataset reference resource representation returned from the API
  
          Returns:
              google.cloud.bigquery.dataset.DatasetReference:
                  Dataset reference parsed from ``resource``.