private void addOverlay(WorkbenchOverlay overlay) {
    LOGGER.trace("addOverlay");
    view.addOverlay(overlay.getOverlay(), overlay.getGlassPane());
  }
Adds an {@code overlay} together with the {@code glassPane} to the view.

@param overlay to be added
workbenchfx-core/src/main/java/com/dlsc/workbenchfx/view/WorkbenchPresenter.java