During the month, contributed to the spring-projects/spring-framework repository by developing a Stream-to-MultiValueMap Collector, enabling direct construction of MultiValueMap instances from Java Streams. This feature reduced boilerplate code and improved the organization of multi-valued datasets, enhancing the expressiveness and efficiency of data processing pipelines. The implementation involved designing a custom Collector pattern in Java, with a focus on seamless integration into existing streaming workflows. Unit testing ensured reliability and traceability, with work linked to relevant Spring Data Commons issues. The contribution expanded the framework’s collection utilities, supporting better downstream integration and increasing developer productivity for multi-valued data scenarios.