async def send_bot_help(self, mapping):
return None<EOL>
|coro|

        Handles the implementation of the bot command page in the help command.
        This function is called when the help command is called with no arguments.

        It should be noted that this method does not return anything -- rather the
        actual message sending should be done inside this method. Well behaved subclasses
        should use :meth:`get_destination` to know where to send, as this is a customisation
        point for other users.

        You can override this method to customise the behaviour.

        .. note::

            You can access the invocation context with :attr:`HelpCommand.context`.

            Also, the commands in the mapping are not filtered. To do the filtering
            you will have to call :meth:`filter_commands` yourself.

        Parameters
        ------------
        mapping: Mapping[Optional[:class:`Cog`], List[:class:`Command`]]
            A mapping of cogs to commands that have been requested by the user for help.
            The key of the mapping is the :class:`~.commands.Cog` that the command belongs to, or
            ``None`` if there isn't one, and the value is a list of commands that belongs to that cog.