'Returns all the minutes for all the sessions from the given start
session label to the given end session label, inclusive.
Parameters
start_session_label: pd.Timestamp
The label of the first session in the range.
end_session_label: pd.Timestamp
The label of the last session in the range.
Returns
pd.DatetimeIndex
The minutes in the desired range.'

def minutes_for_sessions_in_range(self, start_session_label, end_session_label):

    (first_minute, _) = self.open_and_close_for_session(start_session_label)
    (_, last_minute) = self.open_and_close_for_session(end_session_label)
    return self.minutes_in_range(first_minute, last_minute)
