It seems that the Pull Request you referred to is currently undefined or lacks specific details. To create a summary for an advanced developer, it would typically include the following components:

1. Title & Purpose: A brief overview of what the PR aims to achieve or fix.
2. Changes Introduced: A summary of the files affected and what modifications were made.
3. Impact: Any potential effects on the existing codebase, performance considerations, or backward compatibility.
4. Testing: Information on the tests added or modified, as well as the outcomes of those tests.
5. Related Issues: Links to any issues or discussions that the PR addresses.

Since I don’t have the content of the PR, if you could provide specific details or context, I could help compose a more tailored summary suitable for advanced developers.