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Task: Implement a Custom Jackson Serializer for Java Objects

Task: Implement a Custom Jackson Serializer for Java Objects: a task in Terminal-Lego-15k (Harbor dataset). Create a Java program that demonstrates how to use a custom Jackson serializer to control JSON output. Specifically, you need to serialize an Item object so that its nested User object is…

The task

Create a Java program that demonstrates how to use a custom Jackson serializer to control JSON output. Specifically, you need to serialize an `Item` object so that its nested `User` object is represented only by the user's `id` field (an integer), rather than the full User object.

Part of PrimeIntellect/Terminal-Lego-15k.