find Extracts
fun findExtracts(path: String, manifestEntryFor: (Feature) -> Feature? = { null }): FeatureCollection?
The extracts downloaded to path, each annotated with whether it is usable and, given a way to find its current manifest entry with manifestEntryFor, whether it is outdated (see isExtractOutdated). With no manifestEntryFor, nothing is flagged as outdated.