It seems that the details of the Pull Request (PR) you’re referring to are not provided—it’s labeled as “undefined.” To create a meaningful summary, I would need specifics about the changes introduced in the PR, such as:

1. Title of the PR: What is the main focus or goal?
2. Description: What changes or features are being implemented?
3. Motivation: Why were these changes necessary?
4. Code Changes: What are the significant modifications or new files?
5. Impact: How will this change affect the project? Are there any potential breaking changes or important improvements?
6. Related Issues: Does this PR address any open issues or bugs?

Please provide the necessary details or context about the undefined Pull Request so I can assist you with an accurate summary tailored for an advanced developer.