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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 _get(self, url: str) -> str: """A small wrapper method which makes a quick GET request Parameters url : str The URL to get. Returns ------- str The raw html of the requested page. Raises ------ RuneConnectionError If the GET response status is not 200. """

        async with self.session.get(url, headers=self.HEADERS) as r:
            if r.status == 200:
                return await r.text()
            else:
                raise RuneConnectionError(r.status)