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    Type:New Feature 
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    Resolution: Fixed
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    Priority:Unknown 
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    Affects Version/s: None
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    Component/s: None
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We currently have comment and comment_bson fields on some of our options structs to maintain backwards compatibility for users who specified strings for comments before BSON support was introduced. We should remove the comment_bson fields and update the comment fields to be of type Option<Bson> when we do a 3.0 release.