then:
        interaction {
            assertIsClosedCorrectly(mockedHttpResponse)
        }
    }

    HttpResponseResource resource() {
        new HttpResponseResource(method, sourceUrl, new HttpClientResponse("GET", sourceUrl, response))
    }

    void addHeader(String name, String value) {
        interaction {
            1 * response.getFirstHeader(name) >> header(name, value)
        }
    }

Class <org.gradle.internal.resource.transport.http.HttpClientResponse> is not annotated (directly or via its package) with @org.gradle.api.NonNullApi in (HttpClientResponse.java:0)