,
*_names() functions return a vector of names,
n*() return the number of elements channels or components.
channel_names(x, ...)
channel_ica_names(x, ...)
nchannels(x, ...)
component_names(x, ...)
ncomponents(x, ...)
sampling_rate(x, ...)
nsamples(x, ...)An eeg_lst object.
Not in use.
Components are only available after running eeg_ica(). channel_ica_names() refers to channels used in the ICA.
Other summary functions: 
count_complete_cases_tbl(),
eeg_ica_cor_tbl(),
eeg_ica_summary_tbl(),
eeg_ica_var_tbl(),
summary.eeg_lst()