DummyImplementsFooBarStamp example

        $envelope = new Envelope(new DummyMessage('dummy'));

        $this->assertInstanceOf(Envelope::class, $envelope->withoutAll(NonExistentStamp::class));
    }

    public function testWithoutStampsOfType()
    {
        $envelope = new Envelope(new DummyMessage('dummy'), [
            new ReceivedStamp('transport1'),
            new DummyExtendsFooBarStamp(),
            new DummyImplementsFooBarStamp(),
        ]);

        $envelope2 = $envelope->withoutStampsOfType(DummyNothingImplementsMeStampInterface::class);
        $this->assertEquals($envelope, $envelope2);

        $envelope3 = $envelope2->withoutStampsOfType(ReceivedStamp::class);
        $this->assertEmpty($envelope3->all(ReceivedStamp::class));

        $envelope4 = $envelope3->withoutStampsOfType(DummyImplementsFooBarStamp::class);
        $this->assertEmpty($envelope4->all(DummyImplementsFooBarStamp::class));
        $this->assertEmpty($envelope4->all(DummyExtendsFooBarStamp::class));