@class NSString, NSMutableDictionary, HKQueryAnchor; @interface HDDatabaseChangesQueryServer : HDQueryServer { NSMutableDictionary *_pendingSampleTypeChanges; HKQueryAnchor *_anchor; BOOL _hasDeliveredInitialResults; NSString *_detailsQueryDateIndexSQL; NSString *_detailsQueryAnchorIndexSQL; } + (Class)queryClass; - (id)initWithUUID:(id)a0 configuration:(id)a1 client:(id)a2 delegate:(id)a3; - (void)samplesAdded:(id)a0 anchor:(id)a1; - (void)_queue_start; - (id)objectTypes; - (void)didAddSamplesOfTypes:(id)a0 anchor:(id)a1; - (void)samplesOfTypesWereRemoved:(id)a0 anchor:(id)a1; - (void).cxx_destruct; - (BOOL)_shouldListenForUpdates; - (BOOL)validateConfiguration:(id *)a0; @end