Expression leftExpr = filter.getExpression1();
Expression rightExpr = filter.getExpression2();
System.out.println("left expression value: " + leftExpr.evaluate(city));
System.out.println("right expression value: " + rightExpr.evaluate(city));
Boolean result = filter.evaluate(city);
System.out.println("Result of filter evaluation: " + result);
}
private static void afterPredicate() throws Exception{