Testing DirectoryChooser in GroovyFX

dirChooserTest.groovy

@GrabResolver(name='groovyfx', root='https://oss.sonatype.org/content/groups/public')
@Grab('org.codehaus.groovyfx:groovyfx:0.2-SNAPSHOT')

import static groovyx.javafx.GroovyFX.start
import javafx.stage.DirectoryChooser

start {
  stage(title: "DirectoryChooser Test", visible: true) {
    scene(fill: black, width: 530, height: 300) {
      stackPane {
        button('DirChooser') {
          onAction {
            final dirChooser = new DirectoryChooser()
            dirChooser.showDialog(primaryStage)
          }
        }
      }
    }
  }
}