def patch_prior_1_0(plotter_d, versions):
    """Patch psy_maps plotters for versions smaller than 1.0

    Before psyplot 1.0.0, the plotters in the psy_maps package where part of
    the psyplot.plotter.maps module. This has to be corrected"""
    plotter_d['cls'] = 'psy_maps.plotters', plotter_d['cls'][1]
