Get string inside void

I'm using JSon to get some values from a database, and I want to use this values, but they're inside a foreach on a void, how can I get the values ?

Example:

  public void serverResponse(string response)
     {
 
         JSONObject info = new JSONObject(response);
         Debug.Log(response);
         foreach (JSONObject obj in info.list)
         {
             JSONObject oportunity = obj.GetField("oportunity");
             Debug.Log(oportunity.GetField("id").str);
 
             foreach (JSONObject h in oportunity.GetField("resources").list)
             {
                 string resourceID = h.GetField("resource").str;
                 Debug.Log(resourceID);
                 string quantity = h.GetField("quantity").str;
                 Debug.Log(quantity);
             }
             
         } 

I want to take the quantity string and the resourceID out of the foreach, and I don't know how to use Getters and Setters. (GET and SET).