code: public void setContent(Node content) {
          this.content = content;
          if (drawers.size() > 0) {
              drawers.get(0).setContent(content);
          } else {
              getChildren().add(this.content);
          }
      }
docs: set the content of the drawers stack, similar to {@link JFXDrawer#setContent(Node...)}
  
  @param content