vendor/swiftmailer/swiftmailer/lib/classes/Swift/Mime/CharsetObserver.php

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<?php

/*
 * This file is part of SwiftMailer.
 * (c) 2004-2009 Chris Corbyn
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

/**
 * Observes changes in an Mime entity's character set.
 *
 * @author Chris Corbyn
 */
interface Swift_Mime_CharsetObserver
{
    /**
     * Notify this observer that the entity's charset has changed.
     *
     * @param string $charset
     */
    public function charsetChanged($charset);
}