StopTokenFilter with predefined language-specific stop words

[danielsilva]

I'm wondering how to define a StopTokenFilter with predefined language-specific stop words as explained at the docs:

The stopwords parameter accepts either an array of stopwords:

PUT /my_index

{
   "settings": {
       "analysis": {
           "filter": {
               "my_stop": {
                   "type":       "stop",
                   "stopwords": ["and", "is", "the"]
               }
           }
       }
   }
}

or a predefined language-specific list:

PUT /my_index

{
   "settings": {
       "analysis": {
           "filter": {
               "my_stop": {
                   "type":       "stop",
                   "stopwords":  "_english_"
               }
       }
   }
}

But our StopTokenFilter class defines only the array version for this parameter:

[JsonProperty("stopwords")]
public IEnumerable<string> Stopwords { get; set; }

Shouldn't we need a optional parameter for the StopTokenFilter class that receives the predefined language name to use? Like this:

public StopTokenFilter(string predefinedStopWords = null) : base("stop")