code: private Pane buildButtonBar(final boolean isHorizontal) {
  
          if (isHorizontal) {
              this.box = new HBox();
              this.box.setMaxWidth(Region.USE_COMPUTED_SIZE);
  
              this.box.getStyleClass().add("HorizontalTabbedPane");
  
          } else {
              this.box = new VBox();
              this.box.setMaxHeight(Region.USE_COMPUTED_SIZE);
  
              this.box.getStyleClass().add("VerticalTabbedPane");
          }
  
          switch (model().object().orientation()) {
              case top:
                  this.box.getStyleClass().add("Top");
                  ((HBox) this.box).setAlignment(Pos.BOTTOM_LEFT);
                  break;
              case bottom:
                  this.box.getStyleClass().add("Bottom");
                  ((HBox) this.box).setAlignment(Pos.TOP_RIGHT);
                  break;
              case left:
                  this.box.getStyleClass().add("Left");
                  ((VBox) this.box).setAlignment(Pos.TOP_RIGHT);
                  break;
              case right:
                  this.box.getStyleClass().add("Right");
                  ((VBox) this.box).setAlignment(Pos.TOP_LEFT);
                  break;
          }
  
          return this.box;
      }
docs: Builds the button bar.
  
  @param isHorizontal the is horizontal
  @return the pane