generator method code reduction (all languages)

[baywet]

With the recent code changes, we have an opportunity to significantly reduce the amount of code being generated.
The examples will be in C# but it applies to all languages

the generator method currently looks like this

public RequestInformation ToPostRequestInformation(TodoTaskList body, Action<RequestConfiguration<ListsRequestBuilderPostQueryParameters>>? requestConfiguration = null)
{
	if (body == null)
	{
		throw new ArgumentNullException(nameof(body));
	}
	RequestInformation requestInfo = new RequestInformation
	{
		HttpMethod = Method.POST,
		UrlTemplate = base.UrlTemplate,
		PathParameters = base.PathParameters
	};
	if (requestConfiguration != null)
	{
		RequestConfiguration<DefaultQueryParameters> requestConfig = new RequestConfiguration<DefaultQueryParameters>();
		requestConfiguration(requestConfig);
		requestInfo.AddQueryParameters(requestConfig.QueryParameters);
		requestInfo.AddRequestOptions(requestConfig.Options);
		requestInfo.AddHeaders(requestConfig.Headers);
	}
	requestInfo.Headers.TryAdd("Accept", "application/json;q=1");
	requestInfo.SetContentFromParsable(base.RequestAdapter, "application/json", body);
	return requestInfo;
}

And we could change it to that instead

public RequestInformation ToPostRequestInformation(TodoTaskList body, Action<RequestConfiguration<ListsRequestBuilderPostQueryParameters>>? requestConfiguration = null)
{
	if (body == null)
	{
		throw new ArgumentNullException(nameof(body));
	}
	RequestInformation requestInfo = new RequestInformation(Method.POST, base.UrlTemplate, base.PathParameters);
        // saves about 10 IL instructions
        requestInfo.Configure(requestConfiguration);
        // saves another ~30 IL instructions
        // in all other languages it'll be something like requestInfo.Configure(() => new RequestConfiguration<ListsRequestBuilderPostQueryParameters>(), requestConfiguration);
	requestInfo.Headers.TryAdd("Accept", "application/json;q=1");
	requestInfo.SetContentFromParsable(base.RequestAdapter, "application/json", body);
	return requestInfo;
}