### Question:
FileFeedbackWrapper { public boolean containsFeedbackForLine(int line) { return getLatestAvailableVersion(line).isPresent(); } FileFeedbackWrapper(List<String> sortedVersions,
                               Map<String, FileFeedback> versionedFeedback,
                               Map<String, Map<Integer, TranslatedLineNumber>> versionTranslations,
                               Map<Integer, TranslatedLineNumber> localTranslations);  FileFeedbackWrapper(Map<String, FeedbackFilter> filters,
                               List<String> sortedVersions,
                               Map<String, FileFeedback> versionedFeedback,
                               Map<String, Map<Integer, TranslatedLineNumber>> versionTranslations,
                               Map<Integer, TranslatedLineNumber> localTranslations); Set<Integer> getLineNumbersForLatestAvailableVersion(); Optional<VersionWithLineNumber> getNthAvailableVersion(int line, int n); Optional<VersionWithLineNumber> getLatestAvailableVersion(int line); List<RegressionItem> getRegressions(); boolean containsFeedbackForLine(int line); List<LineException> getExceptions(int line); List<LogRecord> getLogging(int line); Optional<Double> getGlobalAverageForLine(int line); Integer getExecutionCount(int line); List<LineExecution> getPerformanceHistory(int line); Optional<Boolean> isLineStale(int line); List<Request> getFirstRequestsForLine(int line); List<VersionRecord> getVersions(int line); List<String> getEndpointNames(); List<String> getRequestParameterNames(String urlRule);  }### Answer:
@Test public void linesContainFeedback() { Assert.assertFalse(fileFeedbackWrapper.containsFeedbackForLine(0)); Assert.assertTrue(fileFeedbackWrapper.containsFeedbackForLine(1)); Assert.assertFalse(fileFeedbackWrapper.containsFeedbackForLine(2)); Assert.assertFalse(fileFeedbackWrapper.containsFeedbackForLine(3)); Assert.assertTrue(fileFeedbackWrapper.containsFeedbackForLine(4)); }