code: protected String formatPlaceholderText(String text) {
          String formattedText = (null != text) ? text.trim() : null;
          int length = (null != formattedText) ? formattedText.length() : 0;
          if (length > 0) {
              return formattedText.substring(0, Math.min(2, length)).toUpperCase(Locale.getDefault());
          }
          return null;
      }
docs: Default implementation of the placeholder text formatting.
  
  @param text
  @return