Common average reference (CAR) with raw

Dear MNE users,

raw = mne.io.read_raw_edf(‘visual_stimulation.edf’)

I read EEG raw data (19 channel ). I would like to know how to do common average reference (CAR) in mne with the raw data.

Best,
Kyu

raw.set_eeg_reference() (mne.set_eeg_reference — MNE 0.23.0 documentation)