9#import <Foundation/Foundation.h>
11NS_ASSUME_NONNULL_BEGIN
13@protocol NIMSystemStateDelegate;
18@protocol NIMSystemStateManager <NSObject>
25- (void)addDelegate:(
id<NIMSystemStateDelegate>)delegate;
32- (void)removeDelegate:(
id<NIMSystemStateDelegate>)delegate;
39@protocol NIMSystemStateDelegate <NSObject>
49- (void)onDiskFull:(NSError *)error;