In PowerBuilder 2019, the way to connect a Rest-Api is with this:

Application Window--
client= CREATE RESTClient
client.SetRequestHeader("Content-Type","application/json")
client.SetRequestHeader("Accept-Encoding","gzip")

Function Window--

String  ls_C019_ResPonse

RestClient lrc_C019
lrc_C019 = Create RestClient

//Connect to RestApi
lrc_C019.SendGetRequest('http://localhost:8080/api/'+api_data, ls_C019_ResPonse)

//Returned Info:
Messagebox("",ls_C019_ResPonse)

Is there a way to connect my Rest-Api, or something like this, using PB 2017 R3?

--PB 2017 mark error in: lrc_C019.SendGetRequest( , )

Thanks.