async fn update_lf_tag(
        &self,
        input: UpdateLFTagRequest,
    ) -> Result<UpdateLFTagResponse, RusotoError<UpdateLFTagError>> {
        let mut request = self.new_signed_request("POST", "/");
        request.add_header("x-amz-target", "AWSLakeFormation.UpdateLFTag");
        let encoded = serde_json::to_string(&input).unwrap();
        request.set_payload(Some(encoded));

        let response = self
            .sign_and_dispatch(request, UpdateLFTagError::from_response)
            .await?;
        let mut response = response;
        let response = response.buffer().await.map_err(RusotoError::HttpDispatch)?;
        proto::json::ResponsePayload::new(&response).deserialize::<UpdateLFTagResponse, _>()
    }
<p>Updates the list of possible values for the specified tag key. If the tag does not exist, the operation throws an EntityNotFoundException. The values in the delete key values will be deleted from list of possible values. If any value in the delete key values is attached to a resource, then API errors out with a 400 Exception - "Update not allowed". Untag the attribute before deleting the tag key's value. </p>
rusoto/services/lakeformation/src/generated.rs