Я вижу "текст не должен быть нулевым" в Groovy

Question

import groovy.json.JsonSlurper
def userDetails, response
def testStepName = 'Adding_Users'

def jsonSlurper = new JsonSlurper()

response = context.expand('${testStepName#Response}')
userDetails = jsonSlurper.parseText(response)

String userName = userInformation.name

log.info UserName