async def METHOD_NAME(self, index, params=None, headers=None):
    """
    Gets the current state of the index.
    :arg index: The name of the index to explain
    """
    if index in SKIP_IN_PATH:
        raise ValueError("Empty value passed for a required argument 'index'.")
    return await self.transport.perform_request(
        "GET",
        _make_path("_plugins", "_ism", "explain", index),
        params=params,
        headers=headers,
    )