Deprecation: #86047 - TSFE properties / methods and change visibility
See forge#86047
Description
The following properties of class 
        \TYPO3\ have changed their visibility from public to protected and should not be called any longer.
- page- Access - Failure - History 
- workspace(not in use anymore)- Preview 
- ADMCMD_(not in use anymore)- preview_ - BEUSER_ - uid 
- debug(not in use anymore)
- MP_(not in use anymore outside of TSFE)- defaults 
- login(use checkIfLoginAllowedInBranch())- Allowed - In - Branch 
The following methods  of class 
        \TYPO3\ have changed their visibility from public to protected, as their purpose is to be called from
within 
        Typo.
- temp- Page - Cache - Content - () 
- real- Page - Cache - Content - () 
- set- Page - Cache - Content - () 
- clear- Page - Cache - Content_ - pid - List - () 
- set- Sys - Last - Changed - () 
- content- Str - Replace - () 
Impact
Calling any of the PHP methods will trigger a PHP 
        E_ error, as well as accessing any of the
previously public properties.
Affected Installations
Any TYPO3 installation with extensions directly calling one of the methods or using one of the public properties.
Migration
For 
        Typo use the backend.user aspect of the Context API.
For 
        Typo use the workspace aspect of the Context API.
For 
        Typo use the method 
        check instead.