FileMetaDataProvider: Implement `refresh()`
Allow for already existing FileMetaDataProvider
instance to be refreshed with latest data.
This depends on !60 (merged) (included here) for ability to cancel previous in-progress refresh.
Allow for already existing FileMetaDataProvider
instance to be refreshed with latest data.
This depends on !60 (merged) (included here) for ability to cancel previous in-progress refresh.