Classes/Cache/Rule/NoBackendUser.php
public function checkRule(TypoScriptFrontendController $frontendController, string $uri, array &$explanation, bool &$skipProcessing)
    {
        if ($frontendController->isBackendUserLoggedIn()) {
            $skipProcessing = true;
            $explanation[__CLASS__] = 'Active BE Login (TSFE:beUserLogin)';
        }
    }
public function checkRule(TypoScriptFrontendController $frontendController, string $uri, array &$explanation, bool &$skipProcessing)
    {
        if ($frontendController->isBackendUserLoggedIn()) {
            $skipProcessing = true;
            $explanation[__CLASS__] = 'Active BE Login (TSFE:beUserLogin)';
        }
    }
public function checkRule ( TypoScriptFrontendController $ frontendController , string $ uri , array & $ explanation , bool & $ skipProcessing ) { if ( $ frontendController -> isBackendUserLoggedIn ( ) ) { $ skipProcessing = true ; $ explanation [ __CLASS__ ] = 'Active BE Login (TSFE:beUserLogin)' ; } }
No active BE user.

@param TypoScriptFrontendController $frontendController
@param string                       $uri
@param array                        $explanation
@param bool                         $skipProcessing
No active BE user .