def METHOD_NAME(panel, segment, label, hide_axis_labels=False):
    print("plotting CV(ISI) histogram (%s)" % label)
    def cv_isi(spiketrain):
        isi = np.diff(np.array(spiketrain))
        return np.std(isi) / np.mean(isi)
    cvs = np.fromiter((cv_isi(st) for st in segment.spiketrains if st.size > 2),
                      dtype=float)
    bin_width = 0.1
    bins = np.arange(0, 2, bin_width)
    cvhist, bins = np.histogram(cvs[~np.isnan(cvs)], bins)
    xlabel = "CV(ISI)"
    ylabel = "n in bin"
    if hide_axis_labels:
        xlabel = None
        ylabel = None
    plot_hist(panel, cvhist, bins, bin_width, label=label,
              xlabel=xlabel, xticks=np.arange(0, 2, 0.5),
              ylabel=ylabel)