Breaking: #74029 - Remove ModuleLoader->getRelativePath()¶
ModuleLoader->getRelativePath() has been removed. It was previously part when registering
traditional script-based modules, which did not use the new Icon API for the backend.
Calling the method above directly will result in a fatal PHP error.
Any installation working with extensions that set up the ModuleLoader class and call the method
PathUtility::getRelativePath() when the functionality is still needed.