@Nullable
  private static Object evaluateNumeric(@NotNull PyNumericLiteralExpression expression) {
    if (expression.isIntegerLiteral()) {
      final BigInteger value = expression.getBigIntegerValue();
      if (value != null) {
        return fromBigInteger(value);
      }
    }

    return null;
  }
@Nullable
  private static Object evaluateNumeric(@NotNull PyNumericLiteralExpression expression)