How to print SSE response body in console?

Gatling (Open-Source)
1

.exec(
sse(“Stocks”).connect("/api/a/dd/batch/${requestID}")
.await(10)(
sse.checkMessage(“DD-SSE-Batch”).check(regex(""“DD-SSE-Batch-(.*)”""))
.check(bodyString.saveAs(“TestDEV_Batch_request”)))
)
.exec( session => {
println(session(“TestDEV_Batch_request”).as[String])
session
})

I am using this particular code, but i am unable to print the response body?