Change record status: 
Project: 
Introduced in branch: 
10.1.x
Introduced in version: 
10.1.0
Description: 

The Extension::__call() magic method is deprecated. It delegated method calls to the SplFileInfo object of the extension.
It has to be replaced with explicit calls like this.
Before:

$mtime = $extension->getMTime();
$ctime = $extension->getCTime();

After:

$mtime = $extension->getFileInfo()->getMTime();
$ctime = $extension->getFileInfo()->getCTime();

This applies as well to all other methods of SPLFileInfo.

Impacts: 
Module developers