in TeamCity.BitBucketIssues-server/src/main/java/jetbrains/buildServer/issueTracker/bitbucket/health/IssueTrackerSuggestion.java [93:98]
private Set<String> extractFetchUrls(@NotNull final Stream<List<? extends VcsRoot>> stream) {
return stream.flatMap(List::stream)
.map(this::getFetchUrl)
.filter(Objects::nonNull)
.collect(Collectors.toSet());
}