No response class implementation for Get index settings

[RolfDeVries]

Elastic.Clients.Elasticsearch version:
8.13.5

Elasticsearch version:
N/A

.NET runtime version:
.Net 8.0

Operating system version:
N/A

Description of the problem including expected versus actual behavior:
I'm upgrading from NEST 7.latest to the new Elastic.Clients.Elasticsearch version.
And I'm missing some features that are not yet supported

Steps to reproduce:

1. Create code to call the Get index settings API

var result = await Client.Indices.GetSettingsAsync(s => s
.Indices(indexName)
.Name("index.analysis.filter." + filterName + ".*")
);

2. Trying to parse the response to get a specific setting:

var indexState = result?.Indices?[indexName];

Expected behavior
In the NEST 7 version, this was easily done
In the Elastic.Client.Elasticsearch 8 it seams that all .net properties are protected and not accesable
Please make sure that this code is backwards compatible with minor effort

Provide ConnectionSettings (if relevant):

Provide DebugInformation (if relevant):

[apr-un]

I get similar problem in Elastic.Clients.Elasticsearch version: 8.13.12 running on .net 8

var indexName = "myindex"; // this index exists
var response = await _elasticClient.Indices.GetSettingsAsync(Indices.Index(indexName), indexName);
if (response.IsValidResponse)
{
  // no known way to get settings from index :(  but I see in debug that Backing Dictionary contains all settings  
  // response.BackingDictionary["myindex"].Settings.Index; // sealed/inaccessible, 
}

Expected result: response contain function/property to get current IndexSettings

[apr-un]

@flobernd any info on this? The same problem still exists on 8.14.2

[flobernd]

@apr-un I will update the issue if there is any progress.

[gtoth93]

In case someone is struggling with this, here is a low level client request that gets a specific index setting:

var indexName = "index-name";
var key = "index.mapping.total_fields.limit";
var settingsResponse = await Client.Transport.RequestAsync<BytesResponse>(
    HttpMethod.GET,
    $"/{indexName}/_settings/{key}", // Request path
    null, // Request body
    new GetIndicesSettingsRequestParameters(), // Query params
    cancellationToken);

using var stream = new MemoryStream(settingsResponse.Body);
var responseBody = Client.RequestResponseSerializer.Deserialize<Dictionary<IndexName, IndexState>>(stream);

To deserialize the response, I used the client's RequestResponseSerializer, which only accepts a stream as a parameter, so I wrapped the response body in a MemoryStream. Maybe there is a more efficient way, but at least it works.