public final Region getOverlay() {
    return overlay;
  }
Initializes a new <b>animated</b> overlay.

@param overlay to be shown as the main content node
@param glassPane to be shown in the background of the overlay
@param animationStart animation that should be played when the overlay is being shown
@param animationEnd animation that should be played when the overlay is being hidden
workbenchfx-core/src/main/java/com/dlsc/workbenchfx/model/WorkbenchOverlay.java