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    <h3>Editing: RejectionException.php</h3>
    <textarea name="content" rows="20" cols="80">&lt;?php

namespace GuzzleHttp\Promise;

/**
 * A special exception that is thrown when waiting on a rejected promise.
 *
 * The reason value is available via the getReason() method.
 */
class RejectionException extends \RuntimeException
{
    /** @var mixed Rejection reason. */
    private $reason;

    /**
     * @param mixed  $reason      Rejection reason.
     * @param string $description Optional description
     */
    public function __construct($reason, $description = null)
    {
        $this-&gt;reason = $reason;

        $message = 'The promise was rejected';

        if ($description) {
            $message .= ' with reason: ' . $description;
        } elseif (is_string($reason)
            || (is_object($reason) &amp;&amp; method_exists($reason, '__toString'))
        ) {
            $message .= ' with reason: ' . $this-&gt;reason;
        } elseif ($reason instanceof \JsonSerializable) {
            $message .= ' with reason: '
                . json_encode($this-&gt;reason, JSON_PRETTY_PRINT);
        }

        parent::__construct($message);
    }

    /**
     * Returns the rejection reason.
     *
     * @return mixed
     */
    public function getReason()
    {
        return $this-&gt;reason;
    }
}
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