Given start and end session labels, return all the sessions in that
        range, inclusive.

        Parameters
        ----------
        start_session_label: pd.Timestamp (midnight UTC)
            The label representing the first session of the desired range.

        end_session_label: pd.Timestamp (midnight UTC)
            The label representing the last session of the desired range.

        Returns
        -------
        pd.DatetimeIndex
            The desired sessions.

def sessions_in_range(self, start_session_label, end_session_label):
        """
        Given start and end session labels, return all the sessions in that
        range, inclusive.

        Parameters
        ----------
        start_session_label: pd.Timestamp (midnight UTC)
            The label representing the first session of the desired range.

        end_session_label: pd.Timestamp (midnight UTC)
            The label representing the last session of the desired range.

        Returns
        -------
        pd.DatetimeIndex
            The desired sessions.
        """
        return self.all_sessions[
            self.all_sessions.slice_indexer(
                start_session_label,
                end_session_label
            )
        ]