How to add a marker click event

How to add a click event to the pop-up marker？

The issue mentions only a pop-up marker click event and names no file, test, or entry point. Start by locating the Swift marker and popup interaction APIs, then establish whether the request needs an implementation change or usage documentation. Done should include a confirmed way to handle the click and a corresponding test or documented example.

Written by the indexing model from the issue text.