Utilities Test Reports utility-domain-exception Domain exception types and shared error structures. utility-exception-mapper Exception-to-response mapping utilities for REST services. utility-invariant Core invariant helpers and reusable constraint checks. utility-producer Factory and producer utilities for dependency injection and mapping. utility-validator Validation utilities and constraint handling helpers. Public API Documentation utility-domain-exception Domain exception types and shared error structures. utility-exception-mapper Exception-to-response mapping utilities for REST services. utility-invariant Core invariant helpers and reusable constraint checks. utility-producer Factory and producer utilities for dependency injection and mapping. utility-validator Validation utilities and constraint handling helpers.