In September 2025, Lazaro refactored the NullAway repository to simplify its API by removing an unnecessary Predicate from the Java codebase. This change streamlined the nullness analysis and propagation APIs, reducing configuration overhead and making the public API easier to understand without altering its functionality. Lazaro focused on code refactoring and static analysis, ensuring that the update improved maintainability and onboarding for new contributors. The work was delivered as a single, targeted commit aligned with project goals, demonstrating careful attention to API design and clarity. Throughout the month, Lazaro worked exclusively in Java, emphasizing clean, maintainable engineering practices.