@_cog_special_method<EOL><INDENT>def cog_check(self, ctx):<DEDENT>
return True<EOL>
A special method that registers as a :func:`commands.check`
        for every command and subcommand in this cog.

        This function **can** be a coroutine and must take a sole parameter,
        ``ctx``, to represent the :class:`.Context`.