def setup(self):
        """Setup."""

        self.blocks = self.config['block_comments']
        self.lines = self.config['line_comments']
        self.group_comments = self.config['group_comments']
        # If the style isn't found, just go with CSS, then use the appropriate prefix.
        self.stylesheets = STYLESHEET_TYPE.get(self.config['stylesheets'].lower(), CSS)
        self.prefix = [k for k, v in STYLESHEET_TYPE.items() if v == SASS][0]
        self.pattern = RE_CSS if self.stylesheets == CSS else RE_SCSS