Sends documentation on <item> to <callback>.

        This can be used for programmatically accessing documentation.

        Keyword arguments:
        is_category -- <bool>; Set this to <True> if <item> is for
                       getting documentation on a permission level and
                       <False> if <item> is for getting documentation on
                       a command.
        item -- <str>; If <is_category> is <True>, this should be one of
                       <"core">, <"mod"> or <"admin"> to get
                       documentation on the commands specific to that
                       permission level. If <is_category> is <False>,
                       this should be the name of the command to get
                       documentation on.

def get_help(self, is_category, item):
        """Sends documentation on <item> to <callback>.

        This can be used for programmatically accessing documentation.

        Keyword arguments:
        is_category -- <bool>; Set this to <True> if <item> is for
                       getting documentation on a permission level and
                       <False> if <item> is for getting documentation on
                       a command.
        item -- <str>; If <is_category> is <True>, this should be one of
                       <"core">, <"mod"> or <"admin"> to get
                       documentation on the commands specific to that
                       permission level. If <is_category> is <False>,
                       this should be the name of the command to get
                       documentation on.
        """
        data = {"cmd": "help"}
        if is_category:
            data["category"] = item
        else:
            data["command"] = item
        self._send_packet(data)