code: @Override
      protected void initView() {
  
          this.openButton = new Button("Open");
          HBox.setHgrow(this.openButton, Priority.ALWAYS);
          this.openButton.setMaxWidth(Double.MAX_VALUE);
  
          this.unloadButton = new Button("Unload");
          this.unloadButton.setDisable(true);
          HBox.setHgrow(this.unloadButton, Priority.ALWAYS);
          this.unloadButton.setMaxWidth(Double.MAX_VALUE);
  
          this.playPauseButton = new Button("Play");
          this.playPauseButton.setDisable(true);
          HBox.setHgrow(this.playPauseButton, Priority.ALWAYS);
          this.playPauseButton.setMaxWidth(Double.MAX_VALUE);
  
          this.backwardButton = new Button("<<");
          this.backwardButton.setDisable(true);
          HBox.setHgrow(this.backwardButton, Priority.ALWAYS);
          this.backwardButton.setMaxWidth(Double.MAX_VALUE);
  
          this.forwardButton = new Button(">>");
          this.forwardButton.setDisable(true);
          HBox.setHgrow(this.forwardButton, Priority.ALWAYS);
          this.forwardButton.setMaxWidth(Double.MAX_VALUE);
  
          this.stopButton = new Button("Stop");
          this.stopButton.setDisable(true);
          HBox.setHgrow(this.stopButton, Priority.ALWAYS);
          this.stopButton.setMaxWidth(Double.MAX_VALUE);
  
          node().getChildren().addAll(
                                             this.openButton,
                                             this.unloadButton,
                                             this.playPauseButton,
                                             this.backwardButton,
                                             this.forwardButton,
                                             this.stopButton);
      }
docs: {@inheritDoc}