Is it possible to create parallel Jenkins Declarative Pipeline stages in a loop?

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I was trying to reduce duplicated code in my existing Jenkinsfile using declarative pipeline syntax. Finally I was able to wrap my head around the difference between scripted and declarative syntax.

It is possible to use scripted pipeline syntax in a declarative pipeline by wrapping it with a script {} block.

Check out my example below: you will see that all three parallel stages finish at the same time after waking up from the sleep command.

def jobs = ["JobA", "JobB", "JobC"]

def parallelStagesMap = jobs.collectEntries {
    ["${it}" : generateStage(it)]
}

def generateStage(job) {
    return {
        stage("stage: ${job}") {
                echo "This is ${job}."
                sh script: "sleep 15"
        }
    }
}

pipeline {
    agent any

    stages {
        stage('non-parallel stage') {
            steps {
                echo 'This stage will be executed first.'
            }
        }

        stage('parallel stage') {
            steps {
                script {
                    parallel parallelStagesMap
                }
            }
        }
    }
}

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