- Update ResolverPlugin interface to allow resolve() to return undefined
- Modify CustomResolver to skip properties with undefined values
- Add test case for resolvers that return undefined
- Update existing tests to handle cases where no properties are resolved
This change makes the behavior more explicit when resolvers don't return a value,
which is particularly important for numeric aggregations where 0 might be a valid result.
Lentil Hoffman
51d336b88b
