def _try_switches(self, lines, index):
        """
        For each switch in the Collector object, pass a list of string,
        representing lines of text in a file, and an index to the current
        line to try to flip the switch. A switch will only flip on if the line
        passes its 'test_on' method, and will only flip off if the line
        passes its 'test_off' method.

        :param lines: List of strings, usually the lines in a text file
        :param index: Number index pointing to the current line
        """
        for s in self._switches:
            s.switch(lines, index)
For each switch in the Collector object, pass a list of string,
        representing lines of text in a file, and an index to the current
        line to try to flip the switch. A switch will only flip on if the line
        passes its 'test_on' method, and will only flip off if the line
        passes its 'test_off' method.

        :param lines: List of strings, usually the lines in a text file
        :param index: Number index pointing to the current line