Standard Output
2023-09-06 13:37:34,135 TRACE [main] org.appng.el.ExpressionEvaluator: setting variable 'a' of type 'java.lang.Integer' to value '5'
2023-09-06 13:37:34,135 TRACE [main] org.appng.el.ExpressionEvaluator: setting variable 'b' of type 'java.lang.Integer' to value '6'
2023-09-06 13:37:34,135 DEBUG [main] org.appng.el.ExpressionEvaluator: ${c eq null} = true [(a = 5), (b = 6), (SESSION = {foo=5, fizz=TRUE})]
true