public function contentAlternative($content, $contentType = null, $charset = null)
    {
        $this->getSwiftMessage()->addPart($content, $contentType, $charset);

        return $this;
    }
public function contentAlternative($content, $contentType = null, $charset = null)
    {
        $this->getSwiftMessage()->addPart($content, $contentType, $charset);

        return $this;
    }
public function contentAlternative ( $ content , $ contentType = null , $ charset = null ) { $ this -> getSwiftMessage ( ) -> addPart ( $ content , $ contentType , $ charset ) ; return $ this ; }
Add optionally an alternative body

@param string $content
@param string $contentType optional
@param string $charset optional

@return $this
Add optionally an alternative body