Implementing ThingSpeak Talkback

ThingSpeak has a TalkBack function but, as near as I can tell, is not implemented in the ThingSpeak library. The Arduino implementation using the Yun Shield below is simple:

#include "Bridge.h"
#include "HttpClient.h"

/**************************************************************************************************************************/
                                                  void checkTalkBack()
/**************************************************************************************************************************/
{
  HttpClient client;

  char charIn;
  String talkBackCommandreply = "";
    
  String talkBackURL =  "http://" + thingSpeakAPI + "/talkbacks/" + talkBackID + "/commands/execute?api_key=" + talkBackAPIKey;
  
  // Make a HTTP GET request to the TalkBack API:

  client.get(talkBackURL);

  // Read the data and build a string
  
  while (client.available()) {
    charIn = client.read();
    talkBackCommandreply += charIn;
  }
}

I have not been able to see how to implement this in Particle. Are there complementary functions for Particle?