Converts all args to 'set' type via self.setify function.

def convert_args_to_sets(f):
    """
    Converts all args to 'set' type via self.setify function.
    """
    @wraps(f)
    def wrapper(*args, **kwargs):
        args = (setify(x) for x in args)
        return f(*args, **kwargs)
    return wrapper