@NotNull
  public static EditorConfigDescribableElement getFirst(@NotNull final EditorConfigOptionValuePair pair) {
    final Optional<PsiElement> first = Arrays.stream(pair.getChildren())
      .filter(child -> child instanceof EditorConfigDescribableElement)
      .findFirst();

    if (first.isEmpty()) {
      throw new IllegalStateException();
    }

    return (EditorConfigDescribableElement)first.get();
  }
@NotNull
  public static EditorConfigDescribableElement getFirst(@NotNull final EditorConfigOptionValuePair pair)