*/
    public function setErrorHandler()
    {
        $this->errorHandler = set_error_handler(
            [$this, 'deprecatedErrorHandler']
        );
    }
 
    /**
     * @param int $errno
     * @param string $errstr
     * @param string $errfile
     * @param int $errline
     * @return bool
     */
    public function deprecatedErrorHandler($errno, $errstr, $errfile, $errline)
    {
        if ($errno !== E_USER_DEPRECATED && $errno !== E_DEPRECATED) {
            if ($this->errorHandler) {
                return call_user_func($this->errorHandler, $errno, $errstr, $errfile, $errline);
            }
 
            return true;
        }
 
        if (!$this->enabled) {
            return true;
        }
 
        // Figure out error scope from the error.
        $scope = 'unknown';
        if (stripos($errstr, 'grav') !== false) {
            $scope = 'grav';
        } elseif (strpos($errfile, '/twig/') !== false) {
            $scope = 'twig';
            // TODO: remove when upgrading to Twig 2+
            if (str_contains($errstr, '#[\ReturnTypeWillChange]') || str_contains($errstr, 'Passing null to parameter')) {
                return true;
            }
        } elseif (stripos($errfile, '/yaml/') !== false) {