Swat/SwatUIObject.php
final protected function getCSSClassString()
    {
        $class_string = null;

        $class_names = $this->getCSSClassNames();
        if (count($class_names) > 0) {
            $class_string = implode(' ', $class_names);
        }

        return $class_string;
    }
final protected function getCSSClassString()
    {
        $class_string = null;

        $class_names = $this->getCSSClassNames();
        if (count($class_names) > 0) {
            $class_string = implode(' ', $class_names);
        }

        return $class_string;
    }
final protected function getCSSClassString ( ) { $ class_string = null ; $ class_names = $ this -> getCSSClassNames ( ) ; if ( count ( $ class_names ) > 0 ) { $ class_string = implode ( ' ' , $ class_names ) ; } return $ class_string ; }
Gets the string representation of this user-interface object's list of
CSS classes

@return string the string representation of the CSS classes that are
applied to this user-interface object. If this object
has no CSS classes, null is returned rather than a blank
string.

@see SwatUIObject::getCSSClassNames()
Gets the string representation of this user - interface object s list of CSS classes