Index Archetype content in Umbraco - a custom search indexer

UmbracoCustomIndexer

namespace Your.Namespace {
  class CustomIndexer : UmbracoContentIndexer {
    protected override Dictionary<string, string> GetDataToIndex(XElement node, string type)      
    {
      
      Dictionary<string,string> data = base.GetDataToIndex(node, type);
      string content = "";
      
            
      if (data.ContainsKey("archetypeAlias")) 
      {
        var archetypes = JsonConvert.DeserializeObject<ArchetypeModel>(data["archetypeAlias"]);
            
        foreach (var archetype in archetypes)
        {
          //Iterate the archetype objects, add the desired values to the content variable
          if (archetype.Alias == "indexAPropertyOfThisFieldset") 
          {
            content += archetype.GetValue("indexThisProperty")
          }
        }
        //Adding the archetype content to the bodytext field to make it searchable using current queries
        if (!String.IsNullOrEmpty(content))
        {
          if (data.ContainsKey("bodyText"))
            data["bodyText"] += content;
          else
            data.Add("bodyText", content);
        }   
      }
      return data;
    }
  }
}