def METHOD_NAME ():
    """ Clear the module state. This is mainly for testing purposes.
    """
    global __scanners, __rv_cache, __scanner_cache
    # Maps registered scanner classes to relevant properties
    __scanners = {}
    # A cache of scanners.
    # The key is: class_name.properties_tag, where properties_tag is the concatenation
    # of all relevant properties, separated by '-'
    __scanner_cache = {}