@Nullable
  private static PyExpression getLeastPrioritySide(@NotNull PyBinaryExpression expression) {
    if (expression.isOperator("**")) {
      return expression.getLeftExpression();
    }
    else {
      return expression.getRightExpression();
    }
  }
@Nullable
  private static PyExpression getLeastPrioritySide(@NotNull PyBinaryExpression expression)