pipeline {
    agent any

    parameters {
        booleanParam(defaultValue: true, description: 'blabla?', name: 'userFlag')
    }

    stages {
        stage("foo") {
            steps {
                echo "flag: ${params.userFlag}"
            }
        }
	post {
		always {
			echo "this is always printed"
		}
	}
    }
}