getClients example

                'method' => 'GET',
                'url' => '/404',
                'options' => ['base_uri' => 'http://localhost:8057/'],
            ],
        ]);
        $httpClient3 = $this->httpClientThatHasTracedRequests([]);
        $sut = new HttpClientDataCollector();
        $sut->registerClient('http_client1', $httpClient1);
        $sut->registerClient('http_client2', $httpClient2);
        $sut->registerClient('http_client3', $httpClient3);
        $this->assertEquals([], $sut->getClients());
        $sut->lateCollect();
        $collectedData = $sut->getClients();
        $this->assertEquals(0, $collectedData['http_client1']['error_count']);
        $this->assertEquals(1, $collectedData['http_client2']['error_count']);
        $this->assertEquals(0, $collectedData['http_client3']['error_count']);
    }

    public function testItCollectsTracesByClient()
    {
        $httpClient1 = $this->httpClientThatHasTracedRequests([
            [