async def METHOD_NAME(self, uri, data=None, headers=None, cache_valid=None):
    if uri.startswith("http"):
        return await self.fetch_content(uri, data, headers, cache_valid)
    local_path = uri[7:] if uri.startswith("file://") else uri
    with io.open(local_path, encoding="utf-8") as fp:
        return fp.read()
    return None