Fetch the dataset referenced by ``dataset_ref``

        Args:
            dataset_ref (Union[ \
                :class:`~google.cloud.bigquery.dataset.DatasetReference`, \
                str, \
            ]):
                A reference to the dataset to fetch from the BigQuery API.
                If a string is passed in, this method attempts to create a
                dataset reference from a string using
                :func:`~google.cloud.bigquery.dataset.DatasetReference.from_string`.
            retry (:class:`google.api_core.retry.Retry`):
                (Optional) How to retry the RPC.

        Returns:
            google.cloud.bigquery.dataset.Dataset:
                A ``Dataset`` instance.

def get_dataset(self, dataset_ref, retry=DEFAULT_RETRY):
        """Fetch the dataset referenced by ``dataset_ref``

        Args:
            dataset_ref (Union[ \
                :class:`~google.cloud.bigquery.dataset.DatasetReference`, \
                str, \
            ]):
                A reference to the dataset to fetch from the BigQuery API.
                If a string is passed in, this method attempts to create a
                dataset reference from a string using
                :func:`~google.cloud.bigquery.dataset.DatasetReference.from_string`.
            retry (:class:`google.api_core.retry.Retry`):
                (Optional) How to retry the RPC.

        Returns:
            google.cloud.bigquery.dataset.Dataset:
                A ``Dataset`` instance.
        """
        if isinstance(dataset_ref, str):
            dataset_ref = DatasetReference.from_string(
                dataset_ref, default_project=self.project
            )

        api_response = self._call_api(retry, method="GET", path=dataset_ref.path)
        return Dataset.from_api_repr(api_response)