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Issue: Optional parameters not supported in controller methods

Issue: Optional parameters not supported in controller methods: a task in LegoFlow-SWE (Harbor dataset). Description When a controller method declares a parameter of type java.util.Optional , the framework fails during route registration or invocation. For example, the following controller method:

The task

**Description** When a controller method declares a parameter of type `java.util.Optional`, the framework fails during route registration or invocation. For example, the following controller method:

Part of Lego-X/LegoFlow-SWE.