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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def _init_conn(self):
 """ This method will be called after `connect` is called. After this method finishes, the writer will be drained. Subclasses should make use of this if they need to send data to Telegram to indicate which connection mode will be used. """

        if self._codec.tag:
            self._writer.write(self._codec.tag)