GraphQL\Error\FormattedError::toSafeTrace PHP Method

    private static function toSafeTrace(array $trace)
    {
        // Remove invariant entries as they don't provide much value:
        if (isset($trace[0]['function']) && isset($trace[0]['class']) && 'GraphQL\\Utils::invariant' === $trace[0]['class'] . '::' . $trace[0]['function']) {
            array_shift($trace);
        } else {
            if (!isset($trace[0]['file'])) {
                array_shift($trace);
            }
        }
        return array_map(function ($err) {
            $safeErr = array_intersect_key($err, ['file' => true, 'line' => true]);
            if (isset($err['function'])) {
                $func = $err['function'];
                $args = !empty($err['args']) ? array_map([__CLASS__, 'printVar'], $err['args']) : [];
                $funcStr = $func . '(' . implode(", ", $args) . ')';
                if (isset($err['class'])) {
                    $safeErr['call'] = $err['class'] . '::' . $funcStr;
                } else {
                    $safeErr['function'] = $funcStr;
                }
            }
            return $safeErr;
        }, $trace);
    }