lib/classes/Swift/Mime/SimpleHeaderSet.php
public function addIdHeader($name, $ids = null)
    {
        $this->storeHeader($name, $this->factory->createIdHeader($name, $ids));
    }
public function addIdHeader($name, $ids = null)
    {
        $this->storeHeader($name, $this->factory->createIdHeader($name, $ids));
    }
public function addIdHeader ( $ name , $ ids = null ) { $ this -> storeHeader ( $ name , $ this -> factory -> createIdHeader ( $ name , $ ids ) ) ; }
Add a new ID header for Message-ID or Content-ID.

@param string       $name
@param string|array $ids
Add a new ID header for Message - ID or Content - ID .