lib/classes/Swift/Mime/SimpleMimeEntity.php
public function setDescription($description)
    {
        if (!$this->setHeaderFieldModel('Content-Description', $description)) {
            $this->headers->addTextHeader('Content-Description', $description);
        }

        return $this;
    }
public function setDescription($description)
    {
        if (!$this->setHeaderFieldModel('Content-Description', $description)) {
            $this->headers->addTextHeader('Content-Description', $description);
        }

        return $this;
    }
public function setDescription ( $ description ) { if ( ! $ this -> setHeaderFieldModel ( 'Content-Description' , $ description ) ) { $ this -> headers -> addTextHeader ( 'Content-Description' , $ description ) ; } return $ this ; }
Set the description of this entity.

This method sets a value in the Content-ID header.

@param string $description

@return $this
Set the description of this entity .