def get_all_narrative_points(switches, enduse):
    """Get all narrative points of an enduse

    Arguments
    ---------
    switches : list
        All switches
    enduse : str
        Enduse

    Returns
    -------
    switch_yrs : list
        All sorted defined timesteps from narrative
    """
    switch_yrs = set([])
    for switch in switches:
        if switch.enduse == enduse:
            switch_yrs.add(switch.switch_yr)
    list(switch_yrs).sort()
    return switch_yrs
