Deprecation: #77477 - TemplateService->fileContent 

See forge#77477

Description 

The method fileContent within the class TemplateService has been marked as deprecated.

Impact 

Calling the method will trigger a deprecation log entry.

Affected Installations 

Any TYPO3 instance with a third-party extension calling the method directly.

Migration 

Implement the same logic directly in PHP with getFileName() and file_get_contents().