Type checking the ExternalIndexerGatheringContentData sender

[charlieanstey]

Hi, first thanks for the great example project, really useful piece of kit.

I'm just extending it to separate each Vorto'd property into separate language fields in my Examine index. So for example, rather than adding just PageContent-en-GB, PageContent-de-DE etc., I might have multiple user fields defined (title, summary etc.). It will instead add title-en-GB, title-de-DE, summary-en-GB, summary-de-DE etc.

In doing this, I've got to check the object sender argument passed in to ExternalIndexerGatheringContentData.

My question: Why is sender of type object and not more specific? Is it possible for it to not be of type UmbracoExamine.UmbracoContentIndexer?

I want to ensure it's the correct type so that I can pull out the UserFields from it type-safely - effectively sender.IndexerData.UserFields. Can you provide any clarification?