Astronauts in space at the moment

astronauts1.groovy

import groovy.json.*
import groovy.transform.*
import com.google.gson.Gson

@Grab('com.google.code.gson:gson:2.8.6')

@Canonical
class Assignment { String name; String craft }

@Canonical
class Response { String message; int number; Assignment[] people }

String jsonTxt = 'http://api.open-notify.org/astros.json'.toURL().text
def json = new JsonSlurper().parseText(jsonTxt)
println "There are ${json.number} people in space"

new Gson().fromJson(jsonTxt, Response).people.each {
  println it
}