def METHOD_NAME(width=8.0, height=0.4):
    """Plot all available colormaps.
    Args:
        width (float, optional): Width of the colormap. Defaults to 8.0.
        height (float, optional): Height of the colormap. Defaults to 0.4.
    """
    cmap_list = list_colormaps()
    nrows = len(cmap_list)
    fig, axes = plt.subplots(nrows=nrows, figsize=(width, height * nrows))
    fig.subplots_adjust(top=0.95, bottom=0.01, left=0.2, right=0.99)
    gradient = np.linspace(0, 1, 256)
    gradient = np.vstack((gradient, gradient))
    for ax, name in zip(axes, cmap_list):
        ax.imshow(gradient, aspect="auto", cmap=plt.get_cmap(name))
        ax.set_axis_off()
        pos = list(ax.get_position().bounds)
        x_text = pos[0] - 0.01
        y_text = pos[1] + pos[3] / 2.0
        fig.text(x_text, y_text, name, va="center", ha="right", fontsize=12)
    # Turn off *all* ticks & spines, not just the ones with colormaps.
    for ax in axes:
        ax.set_axis_off()
    plt.show()