How to use the aioftp.server.ConnectionConditions function in aioftp

            ConnectionConditions.data_connection_made,
            wait=True,
            fail_code="425",
            fail_info="Can't open data connection")
        @worker
        async def stor_worker(self, connection, rest):
            stream = connection.data_connection
            del connection.data_connection
            if connection.restart_offset:
                file_mode = "r+b"
            else:
                file_mode = mode
            file_out = connection.path_io.open(real_path, mode=file_mode)
            async with file_out, stream:
                if connection.restart_offset:
                    await file_out.seek(connection.restart_offset)
                async for data in stream.iter_by_block(connection.block_size):

        @ConnectionConditions(
            ConnectionConditions.data_connection_made,
            wait=True,
            fail_code="425",
            fail_info="Can't open data connection")
        @worker
        async def retr_worker(self, connection, rest):
            stream = connection.data_connection
            del connection.data_connection
            file_in = connection.path_io.open(real_path, mode="rb")
            async with file_in, stream:
                if connection.restart_offset:
                    await file_in.seek(connection.restart_offset)
                async for data in file_in.iter_by_block(connection.block_size):
                    await stream.write(data)
            connection.response("226", "data transfer done")
            return True

    @ConnectionConditions(ConnectionConditions.login_required)
    @PathConditions(
        PathConditions.path_must_exists,
        PathConditions.path_must_be_file)
    @PathPermissions(PathPermissions.writable)
    async def dele(self, connection, rest):
        real_path, virtual_path = self.get_paths(connection, rest)
        await connection.path_io.unlink(real_path)
        connection.response("250", "")
        return True

    @ConnectionConditions(ConnectionConditions.user_required)
    async def pass_(self, connection, rest):
        if connection.future.logged.done():
            code, info = "503", "already logged in"
        elif await self.user_manager.authenticate(connection.user, rest):
            connection.logged = True
            code, info = "230", "normal login"
        else:
            code, info = "530", "wrong password"
        connection.response(code, info)
        return True

        @ConnectionConditions(
            ConnectionConditions.data_connection_made,
            wait=True,
            fail_code="425",
            fail_info="Can't open data connection")
        @worker
        async def list_worker(self, connection, rest):
            stream = connection.data_connection
            del connection.data_connection
            async with stream:
                async for path in connection.path_io.list(real_path):
                    s = await self.build_list_string(connection, path)
                    b = (s + END_OF_LINE).encode(encoding=self.encoding)
                    await stream.write(b)
            connection.response("226", "list transfer done")
            return True

        ConnectionConditions.rename_from_required)
    @PathConditions(PathConditions.path_must_not_exists)
    @PathPermissions(PathPermissions.writable)
    async def rnto(self, connection, rest):
        real_path, virtual_path = self.get_paths(connection, rest)
        rename_from = connection.rename_from
        del connection.rename_from
        await connection.path_io.rename(rename_from, real_path)
        connection.response("250", "")
        return True

    @ConnectionConditions(ConnectionConditions.login_required)
    async def type(self, connection, rest):
        if rest in ("I", "A"):
            connection.transfer_type = rest
            code, info = "200", ""
        else:
            code, info = "502", f"type {rest!r} not implemented"
        connection.response(code, info)
        return True

    @ConnectionConditions(
        ConnectionConditions.login_required,
        ConnectionConditions.rename_from_required)
    @PathConditions(PathConditions.path_must_not_exists)
    @PathPermissions(PathPermissions.writable)
    async def rnto(self, connection, rest):
        real_path, virtual_path = self.get_paths(connection, rest)
        rename_from = connection.rename_from
        del connection.rename_from
        await connection.path_io.rename(rename_from, real_path)
        connection.response("250", "")
        return True

    @ConnectionConditions(
        ConnectionConditions.login_required,
        ConnectionConditions.passive_server_started)
    @PathConditions(
        PathConditions.path_must_exists,
        PathConditions.path_must_be_file)
    @PathPermissions(PathPermissions.readable)
    async def retr(self, connection, rest):

        @ConnectionConditions(
            ConnectionConditions.data_connection_made,
            wait=True,
            fail_code="425",
            fail_info="Can't open data connection")
        @worker
        async def retr_worker(self, connection, rest):
            stream = connection.data_connection