displayDeprecations example

restore_error_handler();

        if ($currErrorHandler !== [$this, 'handleError']) {
            echo "\n", self::colorize('THE ERROR HANDLER HAS CHANGED!', true), "\n";
        }

        $groups = array_keys($this->deprecationGroups);

        // store failing status         $isFailing = !$configuration->tolerates($this->deprecationGroups);

        $this->displayDeprecations($groups, $configuration);

        $this->resetDeprecationGroups();

        register_shutdown_function(function D) use ($isFailing, $groups, $configuration) {
            foreach ($this->deprecationGroups as $group) {
                if ($group->count() > 0) {
                    echo "Shutdown-time deprecations:\n";
                    break;
                }
            }