public final T addCssClass(String value) {
    if (StringUtils.isNotEmpty(value)) {
      return setCssClass(StringUtils.isNotEmpty(getCssClass()) ? getCssClass() + " " + value : value);
    }
    else {
      return (T)this;
    }
  }
public final T addCssClass ( String value ) { if ( StringUtils . isNotEmpty ( value ) ) { return setCssClass ( StringUtils . isNotEmpty ( getCssClass ( ) ) ? getCssClass ( ) + " " + value : value ) ; } else { return ( T ) this ; } }
Html "class" attribute. Adds a single, space-separated value while preserving existing ones.
@param value Value of attribute
@return Self reference