code: public static TextBox initTextBox (TextBox box, String text, int maxLength, int visibleLength)
      {
          if (text != null) {
              box.setText(text);
          }
          box.setMaxLength(maxLength > 0 ? maxLength : 255);
          if (visibleLength > 0) {
              box.setVisibleLength(visibleLength);
          }
          return box;
      }
docs: Configures a text box with all of the configuration that you're bound to want to do. This is
  useful for configuring a PasswordTextBox.