What's Changed
* Only pass if populated by hinthornw in https://github.com/langchain-ai/langsmith-sdk/pull/497
* Tree filter + fix for querying by parent Run by hinthornw in https://github.com/langchain-ai/langsmith-sdk/pull/498
* fix threading by hinthornw in https://github.com/langchain-ai/langsmith-sdk/pull/499
**Full Changelog**: https://github.com/langchain-ai/langsmith-sdk/compare/v0.1.19...v0.1.20