public function withSpecialMark($mark, string $name = 'default'): self
    {
        $this->special_marks[$name] = $mark;

        return $this;
    }
public function withSpecialMark($mark, string $name = 'default'): self
    {
        $this->special_marks[$name] = $mark;

        return $this;
    }
public function withSpecialMark ( $ mark , string $ name = 'default' ) : self { $ this -> special_marks [ $ name ] = $ mark ; return $ this ; }
Mark this object

@param mixed $mark
@return $this
Mark this object