no attribute 'detection'

[pabst2009]

I run the following code with skmob 1.2.3.

import pandas as pd;
import skmob 
print(skmob.__version__)

path = 'my.csv';
df = pd.read_csv(path);
tdf = skmob.TrajDataFrame(df, latitude='latitude_anonymous', longitude='longitude_anonymous', user_id='adid');

stops = skmob.preprocessing.detection.stay_locations(tdf, minutes_for_a_stop=10.0, spatial_radius_km=0.01, leaving_time=True);

Then I got the following error.

AttributeError: module 'skmob.preprocessing' has no attribute 'detection'

Please let me know how to solve this issue.