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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:
 async def getitem(self, url: str, url_vars: Dict[str, str] = {}, *, accept: str = sansio.accept_format(), jwt: Opt[str] = None, oauth_token: Opt[str] = None ) -> Any: """Send a GET request for a single item to the specified endpoint."""


        data, _ = await self._make_request("GET", url, url_vars, b"", accept,
                                           jwt=jwt, oauth_token=oauth_token)
        return data