@asyncio.coroutine<EOL><INDENT>def debug_vmodule(self, pattern):<DEDENT>
return (yield from self.rpc_call('<STR_LIT>', [pattern]))<EOL>
https://github.com/ethereum/go-ethereum/wiki/Management-APIs#debug_vmodule

        :param pattern: Logging verbosity pattern
        :type pattern: str

        :rtype: None