method Decorate.prototype._retrieveMapKeysPagedimport { Decorate } from "https://dotland.deno.dev/x/polkadot@0.2.45/api/base/Decorate.ts"; _retrieveMapKeysPaged(unnamed 0: StorageEntry,at: | Hash | Uint8Array | string | undefined,opts: PaginationOptions,): Observable<StorageKey[]>Parametersunnamed 0: StorageEntryat: | Hash | Uint8Array | string | undefinedopts: PaginationOptionsReturnsObservable<StorageKey[]>