code: @Nonnull
    @OverrideOnDemand
    protected IHCElement <?> createHelpTextNode (@Nonnull final IHCNode aHelpText)
    {
      final BootstrapHelpBlock aHelpBlock = new BootstrapHelpBlock ().addClass (CSS_CLASS_FORM_GROUP_HELP_TEXT);
      aHelpBlock.addChild (aHelpText);
      return aHelpBlock;
    }
docs: Create the help text node
  
  @param aHelpText
  The source help text. Never <code>null</code>.
  @return Never <code>null</code>.