Internal method for querying the GM api for currently running levels
        and storing that state.

def _load_data(self):
        """Internal method for querying the GM api for currently running levels
        and storing that state."""
        url = urljoin(self.base_url, 'levels')
        resp = requests.get(url, headers=self.headers)
        # TOOD: Confirm/deny that this is a real API for the levels currenlty running...
        if resp.content:
            return resp.json()
        else:
            return None