public function getAllElementClassContentClassnames()
    {
        $classnames = array_filter(
            $this->getAllClassContentClassnames(),
            function ($classname) {
                return false !== strpos(
                    $classname,
                    AbstractClassContent::CLASSCONTENT_BASE_NAMESPACE.'Element\\'
                );
            }
        );

        $classnames[] = AbstractClassContent::CLASSCONTENT_BASE_NAMESPACE.'ContentSet';

        return $classnames;
    }
public function getAllElementClassContentClassnames()
    {
        $classnames = array_filter(
            $this->getAllClassContentClassnames(),
            function ($classname) {
                return false !== strpos(
                    $classname,
                    AbstractClassContent::CLASSCONTENT_BASE_NAMESPACE.'Element\\'
                );
            }
        );

        $classnames[] = AbstractClassContent::CLASSCONTENT_BASE_NAMESPACE.'ContentSet';

        return $classnames;
    }
public function getAllElementClassContentClassnames ( ) { $ classnames = array_filter ( $ this -> getAllClassContentClassnames ( ) , function ( $ classname ) { return false !== strpos ( $ classname , AbstractClassContent :: CLASSCONTENT_BASE_NAMESPACE . 'Element\\' ) ; } ) ; $ classnames [ ] = AbstractClassContent :: CLASSCONTENT_BASE_NAMESPACE . 'ContentSet' ; return $ classnames ; }
Returns classnames of all classcontents element

@return string[] Contains every BackBee's element classcontent classnames
Returns classnames of all classcontents element