/** Turn the body of this message into a child of itself if needed */ protected function becomeMimePart() { $part = new parent($this->getHeaders()->newInstance(), $this->getEncoder(), $this->getCache(), $this->getIdGenerator(), $this->userCharset); $part->setContentType($this->userContentType); $part->setBody($this->getBody()); $part->setFormat($this->userFormat); $part->setDelSp($this->userDelSp); $part->setNestingLevel($this->getTopNestingLevel()); return $part; }