public LessonsComposite() {
initWidget(uiBinder.createAndBindUi(this));
setWidth("100%");
setHeight(Window.getClientHeight() + "px");
lessonTreeTitle.getElement().getStyle().setFontSize(16, Style.Unit.PX);
lessonPanel.setLessonsMap(lessonViewNameToWidgetMap);
getAllTreeLessons();
initLessonTree();
}
private void displayError(String error) {
errorMsgLabel.setText("Error: " + error);
errorMsgLabel.setVisible(true);
}