Deprecation: #78477 - Refactoring of FlashMessage rendering 

See forge#78477

Description 

The following methods and properties within FlashMessage::class have been marked as deprecated:

  • FlashMessage->classes
  • FlashMessage->icons
  • FlashMessage->getClass()
  • FlashMessage->getIconName()

Impact 

Using these properties and methods will stop working in TYPO3 v9.

Affected Installations 

All installations using the mentioned methods and properties above.

Migration 

Use the new FlashMessageRendererResolver::class, for example:

GeneralUtility::makeInstance(FlashMessageRendererResolver::class)->resolve()->render()
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