public function addResolutionRequestCancellations(\AgentSIB\Diadoc\Api\Proto\Events\ResolutionRequestCancellationAttachment $value)
    {
        if ($this->ResolutionRequestCancellations === null) {
            $this->ResolutionRequestCancellations = new \Protobuf\MessageCollection();
        }

        $this->ResolutionRequestCancellations->add($value);
    }