Hi Team,

I have a question about the use case of `version` field in the index templates.

https://www.elastic.co/guide/en/elasticsearch/reference/current/indices-templates.html#versioning-templates

I have observed that I can put any version number, doesn't have to follow any pattern.
As the doc also mentions, if we don't provide `version` while updating the template, the version is deleted.

So, my questions:
1. What is the exact use case for `version`?
2. Is there any way to retrieve a template by version number?

Thanks in advance!

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