Question: he error message you're seeing is because you're trying to call the method printLeftI without passing any arguments, but the method is defined to require

he error message you're seeing is because you're trying to call the method printLeftI without passing any arguments, but the method is defined to require a Node argument.In your case, the printLeftI method in the MyIntSET class is defined to require a Node argument. But when you're calling set1.printLeftI(), you're not providing any arguments. That's why the compiler is giving you an error.

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