private void assertDataFeedRequestContent(final List<DataFeedRequest> dataFeedRequests) {
        final List<String> expectedFiles = List.of(
                "0000000001.meta",
                "0000000001.dat",
                "0000000002.meta",
                "0000000002.dat",
                "0000000003.meta",
                "0000000003.dat",
                "0000000004.meta",
                "0000000004.dat");
        assertDataFeedRequestContent(dataFeedRequests, expectedFiles);
    }
Assert that a http header is present and has this value
stroom-proxy/stroom-proxy-app/src/test/java/stroom/proxy/app/MockHttpDestination.java