public static @NotNull @NonNls String getProvidersMapText(@NotNull Map<VirtualFile, VcsLogProvider> providers) {
    return "[" + StringUtil.join(providers.keySet(), file -> file.getPresentableUrl(), ", ") + "]";
  }
public static @NotNull @NonNls String getProvidersMapText(@NotNull Map<VirtualFile, VcsLogProvider> providers)