Dynamic parallel steps (Declarative Pipeline)

DynamicParallelSteps.groovy

pipeline {
    agent { label "linux"}
    stages {
        stage('1') {
            steps {
                script {
                    def tests = [:]
                    for (f in ['a', 'b']) {
                        tests["${f}"] = {
                            node('linux') {
                                stage("${f}") {
                                    def w = pwd()
                                    echo "${f}: ${w}"
                                    echo "workspace:${env.WORKSPACE}"
                                    sh "./check.groovy"
                                }
                            }
                        }
                    }
                    parallel tests
                }
            }
        }       
    }
}