def METHOD_NAME(reason, color='r'):
    '''Helper function - draw a plot with an `x` over it displaying a message
    why that plot is not supported.
    '''
    import matplotlib.pyplot as plt
    fig, ax = plt.subplots()
    xlims = ax.get_xlim()
    ylims = ax.get_ylim()
    ax.plot([0, 1], [0, 1], lw=5, c=color)
    ax.plot([0, 1], [1, 0], lw=5, c=color)
    ax.text(.5, .5, reason, ha='center', va='center', bbox=dict(fc='white'))
    return fig