public static @Nullable String getValue(@NotNull Project project, @NotNull File root, @NotNull @NonNls String key)
    throws VcsException {
    GitLineHandler h = new GitLineHandler(project, root, GitCommand.CONFIG);
    return getValue(h, key);
  }
public static @Nullable String getValue(@NotNull Project project, @NotNull File root, @NotNull @NonNls String key)