private static boolean weMayTrustRunGutterContributors(FileViewProvider vp) {
    for (PsiFile file : vp.getAllFiles()) {
      for (RunLineMarkerContributor contributor : RunLineMarkerContributor.EXTENSION.allForLanguage(file.getLanguage())) {
        if (!contributor.producesAllPossibleConfigurations(file)) {
          return false;
        }
      }
    }
    return true;
  }
private static boolean weMayTrustRunGutterContributors(FileViewProvider vp)