No such DSL method 'waitForQualityGate' found among steps - jenkins

Question

I have problem with method waitForQualityGate(). I got an error "No such DSL method 'waitForQualityGate' found among steps". Another strange thing is that I must use parameter -DX for sonarscanner. I don't know what is wrong. Thanks for help.
pipeline {
agent { label 'builders' }
tools {
maven 'maven 3.3.9'
}
stages {
stage ('Checkout'){
steps {
git branch: 'develop', credentialsId: 'credential', url: 'ssh://repository'
}
}
stage ('Build'){
steps {
withMaven (
maven: 'maven 3.3.9',
mavenSettingsConfig: 'cc86690e-095d-4714-92b2-b61861241c7a'){
sh 'mvn -U clean package -DskipTests'
}
}
}
stage ('SonarQube Scan'){
steps {
withSonarQubeEnv('SonarQube') {
withMaven (
maven: 'maven 3.3.9',
mavenSettingsConfig: 'cc86690e-095d-4714-92b2-b61861241c7a'){
sh 'mvn org.sonarsource.scanner.maven:sonar-maven-plugin:3.3.0.603:sonar ' +
'-DX' +
'-Dsonar.login=login' +
'-Dsonar.password=password' +
'-Dsonar.issuesReport.json.enable=true' +
'-Dsonar.report.export.path=sonar-report.json'
}
} // SonarQube taskId is automatically attached to the pipeline context
}
}
stage ('Quality Gate') {
steps {
timeout(time: 1, unit: 'HOURS') { // Just in case something goes wrong, pipeline will be killed after a timeout
script {
def qg = waitForQualityGate() // Reuse taskId previously collected by withSonarQubeEnv
if (qg.status != 'OK') {
error "Pipeline aborted due to quality gate failure: ${qg.status}"
}
}
}
}
}
}
}

Answer 1

This will not be an immediate answer, but the reason for the error is, you are calling a custom method without even loading it initially. Load the groovy file that have the method, which jenkins is complaining that dsl doesn't exist... only when you load the groovy file/the class, then you can instantiate it.
Cannot do this, without loading it ... def qg = waitForQualityGate()
If its a method, u have to call it and it should return something...