def parse_stylesheet(self, css_unicode, encoding=None):
        tokens = tokenize_grouped(css_unicode)
        if encoding:
            tokens = _remove_at_charset(tokens)
        rules, errors = self.parse_rules(tokens, context='stylesheet')
        return Stylesheet(rules, errors, encoding)
Returns a boolean value indicating whether there is previous data
dataset/ETHPy150Open FichteFoll/CSScheme/tinycsscheme/tinycss/css21.py/CSS21Parser.parse_stylesheet--crossover with--dataset/ETHPy150Open CiscoSystems/avos/horizon/tables/base.py/DataTable.has_prev_data