code: public void init() {
          if (initialized) {
              return;
          }
          Widget parent = inputWidget.getParent();
          while (parent != null && !parent.getClass().getName().equals("com.google.gwt.user.client.ui.Widget")) {
              helpBlock = findHelpBlock(inputWidget);
              if (helpBlock != null) {
                  break;
              } else {
                  parent = parent.getParent();
              }
          }
          initialized = true;
      }
docs: Initialize the instance.