if (jobConfig.scm?.type in ['github', null]) {
  this.handleScmResponse = {
    // TODO: check why default values doesn't work
    script, state = '0', message = null ->
    logGithubTestStatus script, state, message
  }
} else {
  this.handleScmResponse = {
    jobConfig, script, nameOfTest, state = null, message = null ->
    def currentMessage = message ?: stateMap[state]
    echo "State: ${state}, Message: ${currentMessage}"
  }
}

def logGithubTestStatus(script, String state = '0', message = '') {
  script.echo " ${message}"
  if (state == '-1') script.error "test failed"
}

def handleScmFromShell(script, String command) {
  def result = script.sh(script: command, returnStatus: true)
  this.handleScmResponse(script, result ? '-1' : '+1')
}

node 'master', {
   try {
      sh 'echo "def f = { x = [1] -> x += 1; x += 2; println x }\nf()\nf()\nprintln x\nreturn this" > test.groovy'
      load 'test.groovy'
   } finally {
      sh 'rm test.groovy'
   }
}

[workspace] Running shell script
+ echo 'def f = { x = [1] -> x += 1; x += 2; println x }
f()
f()
println x
return this'
[Pipeline] load
[Pipeline] { (test.groovy)
[Pipeline] }
[Pipeline] // load
[Pipeline] sh
[workspace] Running shell script
+ rm test.groovy
[Pipeline] }
[Pipeline] // node
[Pipeline] End of Pipeline
java.lang.NullPointerException: Cannot execute null+1