async def prepare_help_command(self, ctx, command=None):
pass<EOL>
|coro|

        A low level method that can be used to prepare the help command
        before it does anything. For example, if you need to prepare
        some state in your subclass before the command does its processing
        then this would be the place to do it.

        The default implementation does nothing.

        .. note::

            This is called *inside* the help command callback body. So all
            the usual rules that happen inside apply here as well.

        Parameters
        -----------
        ctx: :class:`Context`
            The invocation context.
        command: Optional[:class:`str`]
            The argument passed to the help command.