public function isAbstract($status = null)
    {
        $this->is_abstract = $status !== null ? $status : $this->is_abstract;
        return $this->is_abstract ;
    }
public function isAbstract($status = null)
    {
        $this->is_abstract = $status !== null ? $status : $this->is_abstract;
        return $this->is_abstract ;
    }
public function isAbstract ( $ status = null ) { $ this -> is_abstract = $ status !== null ? $ status : $ this -> is_abstract ; return $ this -> is_abstract ; }
Is an abstract class

@return \Deflection\Element\Classes
Is an abstract class