@NotNull
  private List<VcsRootError> getImportantUnregisteredMappings(@NotNull Collection<? extends VcsRootError> errors) {
    return filter(errors, error -> {
      VcsDirectoryMapping mapping = error.getMapping();
      return error.getType() == UNREGISTERED_ROOT &&
             !isIgnoredOrExcludedPath(mapping) &&
             !isExplicitlyIgnoredPath(mapping) &&
             !conflictsWithExistingMapping(mapping);
    });
  }
@NotNull
  private List<VcsRootError> getImportantUnregisteredMappings(@NotNull Collection<? extends VcsRootError> errors)