public function getCreatedAt()
    {
        $createdAtAttribute = $this->createdAtAttribute;
        if (!is_string($createdAtAttribute) || empty($createdAtAttribute)) {
            return null;
        }
        return $this->$createdAtAttribute;
    }
public function getCreatedAt()
    {
        $createdAtAttribute = $this->createdAtAttribute;
        if (!is_string($createdAtAttribute) || empty($createdAtAttribute)) {
            return null;
        }
        return $this->$createdAtAttribute;
    }
public function getCreatedAt ( ) { $ createdAtAttribute = $ this -> createdAtAttribute ; if ( ! is_string ( $ createdAtAttribute ) || empty ( $ createdAtAttribute ) ) { return null ; } return $ this -> $ createdAtAttribute ; }
Get creation time.
@return string timestamp
Get creation time .