How to use the pynvim.api.common.NvimError function in pynvim

        session.error_wrapper = lambda e: NvimError(decode_if_bytes(e[1]))
        channel_id, metadata = session.request(b'nvim_get_api_info')

self.metadata = metadata
        version = metadata.get("version", {"api_level": 0})
        self.version = Version(**version)
        self.types = types
        self.api = RemoteApi(self, 'nvim_')
        self.vars = RemoteMap(self, 'nvim_get_var', 'nvim_set_var', 'nvim_del_var')
        self.vvars = RemoteMap(self, 'nvim_get_vvar', None, None)
        self.options = RemoteMap(self, 'nvim_get_option', 'nvim_set_option')
        self.buffers = Buffers(self)
        self.windows = RemoteSequence(self, 'nvim_list_wins')
        self.tabpages = RemoteSequence(self, 'nvim_list_tabpages')
        self.current = Current(self)
        self.session = CompatibilitySession(self)
        self.funcs = Funcs(self)
        self.lua = LuaFuncs(self)
        self.error = NvimError
        self._decode = decode
        self._err_cb = err_cb

        # only on python3.4+ we expose asyncio
        if IS_PYTHON3:
            self.loop = self._session.loop._loop

def cleanup(self):
        """Cleanup the windows and buffers."""
        for buf in self.buffers:
            try:
                self.vim.command(f"silent bdelete {buf.handle}")
            except pynvim.api.common.NvimError as ex:
                self.logger.warning("Skip cleaning up the buffer: %s", ex)

Normally a blocking request will be sent.  If the `async_` flag is
        present and True, a asynchronous notification is sent instead. This
        will never block, and the return value or error is ignored.
        """
        if (self._session._loop_thread is not None
                and threading.current_thread() != self._session._loop_thread):

            msg = ("Request from non-main thread.\n"
                   "Requests from different threads should be wrapped "
                   "with nvim.async_call(cb, ...) \n{}\n"
                   .format('\n'.join(format_stack(None, 5)[:-1])))

            self.async_call(self._err_cb, msg)
            raise NvimError("request from non-main thread")

        decode = kwargs.pop('decode', self._decode)
        args = walk(self._to_nvim, args)
        res = self._session.request(name, *args, **kwargs)
        return walk(self._from_nvim, res, decode=decode)