// The returned cache will always be valid, but may not be updated from the existing.
// Before each operation sleepDuration is called which can be used to temporarily halt the scanner.
// If the supplied context is canceled the function will return at the first chance.

v--nx?c,d&ob?rav??ievs?kssouf?l&m&ob?øb??ous&adna?ech&ac?áč???so!.sg???msdeks?niekotuak?r&egark?olf?y&oso?øso???s&dav?mort???p&ed?ohsdaerpsym,p&akdron?elk???r&a&d&dj&ab?áb??iab??jtif?luag?mah?vsyt??e&gn&a&k&iel?ro??merb?n&at?mas??rav-r&os?øs??srop?talf?v&ats?el??y&oh?øh???ivsgnok??il?jkniets?k&a&nvej?rem?s&gnir?nellu???ie-er&den?v&o?ø???ram?sa?årem??la&jf?vh??m&b&ah?áh??mahellil??nnul?ts&l&oj?øj??ul??y&o?ø???imp&ah?áh??m!.sg??osir?t!.sg??ádiáb?ævsyt?øsir??s&adnil?en&dnas?e&dga?k&ri&b?k??som??ve?...