How to find the version number of 3D WebView installed in a project?

When 3D WebView runs in a compiled app, it prints its version number to the Player log in a message like this:

Using Vuplex 3D WebView for Android v4.4

This log message includes the name of the specific 3D WebView package and the version number. This functionality was first added in v3.9 (released in September 2020), so if you don't see a message like this in the logs, it may indicate that your project is using a version older than v3.9.