CoreWLAN Changes for Objective-C

CoreWLAN

CoreWLANUtil.h

	Declaration
From	OSStatus CWKeychainCopyEAPIdentity ( CFDataRef ssidData, SecIdentityRef *identity );
To	OSStatus CWKeychainCopyEAPIdentity ( CFDataRef _Nonnull ssidData, SecIdentityRef _Nullable * _Nullable identity );

Modified CWKeychainCopyEAPIdentityList()

	Declaration
From	OSStatus CWKeychainCopyEAPIdentityList ( CFArrayRef *list );
To	OSStatus CWKeychainCopyEAPIdentityList ( CFArrayRef _Nullable * _Nullable list );

Modified CWKeychainCopyEAPUsernameAndPassword()

	Declaration
From	OSStatus CWKeychainCopyEAPUsernameAndPassword ( CFDataRef ssidData, CFStringRef username, CFStringRef password );
To	OSStatus CWKeychainCopyEAPUsernameAndPassword ( CFDataRef _Nonnull ssidData, CFStringRef _Nullable * _Nullable username, CFStringRef _Nullable * _Nullable password );

Declaration

From

OSStatus CWKeychainCopyEAPUsernameAndPassword (
    CFDataRef ssidData,
    CFStringRef *username,
    CFStringRef *password
);

OSStatus CWKeychainCopyEAPUsernameAndPassword (
    CFDataRef _Nonnull ssidData,
    CFStringRef  _Nullable * _Nullable username,
    CFStringRef  _Nullable * _Nullable password
);

Modified CWKeychainCopyPassword()

	Declaration
From	OSStatus CWKeychainCopyPassword ( CFDataRef ssidData, CFStringRef *password );
To	OSStatus CWKeychainCopyPassword ( CFDataRef _Nonnull ssidData, CFStringRef _Nullable * _Nullable password );

Modified CWKeychainCopyWiFiEAPIdentity()

	Declaration
From	OSStatus CWKeychainCopyWiFiEAPIdentity ( CWKeychainDomain domain, NSData ssid, SecIdentityRef identity );
To	OSStatus CWKeychainCopyWiFiEAPIdentity ( CWKeychainDomain domain, NSData * _Nonnull ssid, SecIdentityRef _Nullable * _Nullable identity );

Declaration

From

OSStatus CWKeychainCopyWiFiEAPIdentity (
    CWKeychainDomain domain,
    NSData *ssid,
    SecIdentityRef *identity
);

OSStatus CWKeychainCopyWiFiEAPIdentity (
    CWKeychainDomain domain,
    NSData * _Nonnull ssid,
    SecIdentityRef  _Nullable * _Nullable identity
);

Modified CWKeychainDeleteEAPUsernameAndPassword()

	Declaration
From	OSStatus CWKeychainDeleteEAPUsernameAndPassword ( CFDataRef ssidData );
To	OSStatus CWKeychainDeleteEAPUsernameAndPassword ( CFDataRef _Nonnull ssidData );

Modified CWKeychainDeletePassword()

	Declaration
From	OSStatus CWKeychainDeletePassword ( CFDataRef ssidData );
To	OSStatus CWKeychainDeletePassword ( CFDataRef _Nonnull ssidData );

Modified CWKeychainDeleteWiFiEAPUsernameAndPassword()

	Declaration
From	OSStatus CWKeychainDeleteWiFiEAPUsernameAndPassword ( CWKeychainDomain domain, NSData *ssid );
To	OSStatus CWKeychainDeleteWiFiEAPUsernameAndPassword ( CWKeychainDomain domain, NSData * _Nonnull ssid );

Modified CWKeychainDeleteWiFiPassword()

	Declaration
From	OSStatus CWKeychainDeleteWiFiPassword ( CWKeychainDomain domain, NSData *ssid );
To	OSStatus CWKeychainDeleteWiFiPassword ( CWKeychainDomain domain, NSData * _Nonnull ssid );

Modified CWKeychainFindWiFiEAPUsernameAndPassword()

	Declaration
From	OSStatus CWKeychainFindWiFiEAPUsernameAndPassword ( CWKeychainDomain domain, NSData ssid, NSString username, NSString *password );
To	OSStatus CWKeychainFindWiFiEAPUsernameAndPassword ( CWKeychainDomain domain, NSData * _Nonnull ssid, NSString * _Nullable * _Nullable username, NSString * _Nullable * _Nullable password );

Declaration

From

OSStatus CWKeychainFindWiFiEAPUsernameAndPassword (
    CWKeychainDomain domain,
    NSData *ssid,
    NSString **username,
    NSString **password
);

OSStatus CWKeychainFindWiFiEAPUsernameAndPassword (
    CWKeychainDomain domain,
    NSData * _Nonnull ssid,
    NSString * _Nullable * _Nullable username,
    NSString * _Nullable * _Nullable password
);

Modified CWKeychainFindWiFiPassword()

	Declaration
From	OSStatus CWKeychainFindWiFiPassword ( CWKeychainDomain domain, NSData ssid, NSString *password );
To	OSStatus CWKeychainFindWiFiPassword ( CWKeychainDomain domain, NSData * _Nonnull ssid, NSString * _Nullable * _Nullable password );

Declaration

From

OSStatus CWKeychainFindWiFiPassword (
    CWKeychainDomain domain,
    NSData *ssid,
    NSString **password
);

OSStatus CWKeychainFindWiFiPassword (
    CWKeychainDomain domain,
    NSData * _Nonnull ssid,
    NSString * _Nullable * _Nullable password
);

Modified CWKeychainSetEAPIdentity()

	Declaration
From	OSStatus CWKeychainSetEAPIdentity ( CFDataRef ssidData, SecIdentityRef identity );
To	OSStatus CWKeychainSetEAPIdentity ( CFDataRef _Nonnull ssidData, SecIdentityRef _Nullable identity );

Modified CWKeychainSetEAPUsernameAndPassword()

	Declaration
From	OSStatus CWKeychainSetEAPUsernameAndPassword ( CFDataRef ssidData, CFStringRef username, CFStringRef password );
To	OSStatus CWKeychainSetEAPUsernameAndPassword ( CFDataRef _Nonnull ssidData, CFStringRef _Nullable username, CFStringRef _Nullable password );

Declaration

From

OSStatus CWKeychainSetEAPUsernameAndPassword (
    CFDataRef ssidData,
    CFStringRef username,
    CFStringRef password
);

OSStatus CWKeychainSetEAPUsernameAndPassword (
    CFDataRef _Nonnull ssidData,
    CFStringRef _Nullable username,
    CFStringRef _Nullable password
);

Modified CWKeychainSetPassword()

	Declaration
From	OSStatus CWKeychainSetPassword ( CFDataRef ssidData, CFStringRef password );
To	OSStatus CWKeychainSetPassword ( CFDataRef _Nonnull ssidData, CFStringRef _Nonnull password );

Modified CWKeychainSetWiFiEAPIdentity()

	Declaration
From	OSStatus CWKeychainSetWiFiEAPIdentity ( CWKeychainDomain domain, NSData *ssid, SecIdentityRef identity );
To	OSStatus CWKeychainSetWiFiEAPIdentity ( CWKeychainDomain domain, NSData * _Nonnull ssid, SecIdentityRef _Nullable identity );

Declaration

From

OSStatus CWKeychainSetWiFiEAPIdentity (
    CWKeychainDomain domain,
    NSData *ssid,
    SecIdentityRef identity
);

OSStatus CWKeychainSetWiFiEAPIdentity (
    CWKeychainDomain domain,
    NSData * _Nonnull ssid,
    SecIdentityRef _Nullable identity
);

Modified CWKeychainSetWiFiEAPUsernameAndPassword()

	Declaration
From	OSStatus CWKeychainSetWiFiEAPUsernameAndPassword ( CWKeychainDomain domain, NSData ssid, NSString username, NSString *password );
To	OSStatus CWKeychainSetWiFiEAPUsernameAndPassword ( CWKeychainDomain domain, NSData * _Nonnull ssid, NSString * _Nullable username, NSString * _Nullable password );

Declaration

From

OSStatus CWKeychainSetWiFiEAPUsernameAndPassword (
    CWKeychainDomain domain,
    NSData *ssid,
    NSString *username,
    NSString *password
);

OSStatus CWKeychainSetWiFiEAPUsernameAndPassword (
    CWKeychainDomain domain,
    NSData * _Nonnull ssid,
    NSString * _Nullable username,
    NSString * _Nullable password
);

Modified CWKeychainSetWiFiPassword()

	Declaration
From	OSStatus CWKeychainSetWiFiPassword ( CWKeychainDomain domain, NSData ssid, NSString password );
To	OSStatus CWKeychainSetWiFiPassword ( CWKeychainDomain domain, NSData * _Nonnull ssid, NSString * _Nonnull password );

Declaration

From

OSStatus CWKeychainSetWiFiPassword (
    CWKeychainDomain domain,
    NSData *ssid,
    NSString *password
);

OSStatus CWKeychainSetWiFiPassword (
    CWKeychainDomain domain,
    NSData * _Nonnull ssid,
    NSString * _Nonnull password
);

Modified CWMergeNetworks()

	Declaration
From	NSSet * CWMergeNetworks ( NSSet *networks );
To	NSSet<CWNetwork > _Nonnull CWMergeNetworks ( NSSet<CWNetwork > _Nonnull networks );

CWChannel.h

Modified -[CWChannel isEqualToChannel:]

	Declaration
From	- (BOOL)isEqualToChannel:(CWChannel *)channel
To	- (BOOL)isEqualToChannel:(CWChannel * _Nonnull)channel

CWConfiguration.h

Modified +[CWConfiguration configuration]

	Declaration
From	+ (instancetype)configuration
To	+ (instancetype _Nonnull)configuration

Modified +[CWConfiguration configurationWithConfiguration:]

	Declaration
From	+ (instancetype)configurationWithConfiguration:(CWConfiguration *)configuration
To	+ (instancetype _Nonnull)configurationWithConfiguration:(CWConfiguration * _Nonnull)configuration

Modified -[CWConfiguration init]

	Declaration
From	- (instancetype)init
To	- (instancetype _Nonnull)init

Modified -[CWConfiguration initWithConfiguration:]

	Declaration
From	- (instancetype)initWithConfiguration:(CWConfiguration *)configuration
To	- (instancetype _Nonnull)initWithConfiguration:(CWConfiguration * _Nonnull)configuration

Modified -[CWConfiguration isEqualToConfiguration:]

	Declaration
From	- (BOOL)isEqualToConfiguration:(CWConfiguration *)configuration
To	- (BOOL)isEqualToConfiguration:(CWConfiguration * _Nonnull)configuration

Modified CWConfiguration.networkProfiles

	Declaration
From	@property(readonly, copy) NSOrderedSet *networkProfiles
To	@property(readonly, copy, nonnull) NSOrderedSet<CWNetworkProfile > networkProfiles

Modified CWMutableConfiguration.networkProfiles

	Declaration
From	@property(copy) NSOrderedSet *networkProfiles
To	@property(copy, nonnull) NSOrderedSet<CWNetworkProfile > networkProfiles

CWInterface.h

Modified -[CWInterface associateToEnterpriseNetwork:identity:username:password:error:]

	Declaration
From	- (BOOL)associateToEnterpriseNetwork:(CWNetwork )network identity:(SecIdentityRef)identity username:(NSString )username password:(NSString )password error:(out NSError *)error
To	- (BOOL)associateToEnterpriseNetwork:(CWNetwork * _Nonnull)network identity:(SecIdentityRef _Nullable)identity username:(NSString * _Nullable)username password:(NSString * _Nullable)password error:(out NSError * _Nullable * _Nullable)error

Declaration

From

- (BOOL)associateToEnterpriseNetwork:(CWNetwork *)network identity:(SecIdentityRef)identity username:(NSString *)username password:(NSString *)password error:(out NSError **)error

- (BOOL)associateToEnterpriseNetwork:(CWNetwork * _Nonnull)network identity:(SecIdentityRef _Nullable)identity username:(NSString * _Nullable)username password:(NSString * _Nullable)password error:(out NSError * _Nullable * _Nullable)error

Modified -[CWInterface associateToNetwork:password:error:]

	Declaration
From	- (BOOL)associateToNetwork:(CWNetwork )network password:(NSString )password error:(out NSError **)error
To	- (BOOL)associateToNetwork:(CWNetwork * _Nonnull)network password:(NSString * _Nullable)password error:(out NSError * _Nullable * _Nullable)error

Declaration

From

- (BOOL)associateToNetwork:(CWNetwork *)network password:(NSString *)password error:(out NSError **)error

- (BOOL)associateToNetwork:(CWNetwork * _Nonnull)network password:(NSString * _Nullable)password error:(out NSError * _Nullable * _Nullable)error

Modified -[CWInterface bssid]

	Declaration
From	- (NSString *)bssid
To	- (NSString * _Nullable)bssid

Modified -[CWInterface cachedScanResults]

	Declaration
From	- (NSSet *)cachedScanResults
To	- (NSSet<CWNetwork > _Nullable)cachedScanResults

Modified -[CWInterface commitConfiguration:authorization:error:]

	Declaration
From	- (BOOL)commitConfiguration:(CWConfiguration )configuration authorization:(SFAuthorization )authorization error:(out NSError **)error
To	- (BOOL)commitConfiguration:(CWConfiguration * _Nonnull)configuration authorization:(SFAuthorization * _Nullable)authorization error:(out NSError * _Nullable * _Nullable)error

Declaration

From

- (BOOL)commitConfiguration:(CWConfiguration *)configuration authorization:(SFAuthorization *)authorization error:(out NSError **)error

- (BOOL)commitConfiguration:(CWConfiguration * _Nonnull)configuration authorization:(SFAuthorization * _Nullable)authorization error:(out NSError * _Nullable * _Nullable)error

Modified -[CWInterface configuration]

	Declaration
From	- (CWConfiguration *)configuration
To	- (CWConfiguration * _Nullable)configuration

Modified -[CWInterface countryCode]

	Declaration
From	- (NSString *)countryCode
To	- (NSString * _Nullable)countryCode

Modified -[CWInterface hardwareAddress]

	Declaration
From	- (NSString *)hardwareAddress
To	- (NSString * _Nullable)hardwareAddress

Modified -[CWInterface initWithInterfaceName:]

	Declaration
From	- (instancetype)initWithInterfaceName:(NSString *)name
To	- (instancetype _Nonnull)initWithInterfaceName:(NSString * _Nonnull)name

Modified +[CWInterface interface]

	Declaration
From	+ (instancetype)interface
To	+ (instancetype _Nonnull)interface

Modified CWInterface.interfaceName

	Declaration
From	@property(readonly) NSString *interfaceName
To	@property(readonly, nullable) NSString *interfaceName

Modified +[CWInterface interfaceNames]

	Declaration
From	+ (NSSet *)interfaceNames
To	+ (NSSet<NSString > _Nullable)interfaceNames

Modified +[CWInterface interfaceWithName:]

	Declaration
From	+ (instancetype)interfaceWithName:(NSString *)name
To	+ (instancetype _Nonnull)interfaceWithName:(NSString * _Nonnull)name

Modified -[CWInterface scanForNetworksWithName:error:]

	Declaration
From	- (NSSet )scanForNetworksWithName:(NSString )networkName error:(out NSError **)error
To	- (NSSet<CWNetwork > _Nullable)scanForNetworksWithName:(NSString * _Nullable)networkName error:(out NSError * _Nullable * _Nullable)error

Declaration

From

- (NSSet *)scanForNetworksWithName:(NSString *)networkName error:(out NSError **)error

- (NSSet<CWNetwork *> * _Nullable)scanForNetworksWithName:(NSString * _Nullable)networkName error:(out NSError * _Nullable * _Nullable)error

Modified -[CWInterface scanForNetworksWithSSID:error:]

	Declaration
From	- (NSSet )scanForNetworksWithSSID:(NSData )ssid error:(out NSError **)error
To	- (NSSet<CWNetwork > _Nullable)scanForNetworksWithSSID:(NSData * _Nullable)ssid error:(out NSError * _Nullable * _Nullable)error

Declaration

From

- (NSSet *)scanForNetworksWithSSID:(NSData *)ssid error:(out NSError **)error

- (NSSet<CWNetwork *> * _Nullable)scanForNetworksWithSSID:(NSData * _Nullable)ssid error:(out NSError * _Nullable * _Nullable)error

Modified -[CWInterface setPairwiseMasterKey:error:]

	Declaration
From	- (BOOL)setPairwiseMasterKey:(NSData )key error:(out NSError *)error
To	- (BOOL)setPairwiseMasterKey:(NSData * _Nullable)key error:(out NSError * _Nullable * _Nullable)error

Modified -[CWInterface setPower:error:]

	Declaration
From	- (BOOL)setPower:(BOOL)power error:(out NSError **)error
To	- (BOOL)setPower:(BOOL)power error:(out NSError * _Nullable * _Nullable)error

Modified -[CWInterface setWEPKey:flags:index:error:]

	Declaration
From	- (BOOL)setWEPKey:(NSData )key flags:(CWCipherKeyFlags)flags index:(NSInteger)index error:(out NSError *)error
To	- (BOOL)setWEPKey:(NSData * _Nullable)key flags:(CWCipherKeyFlags)flags index:(NSInteger)index error:(out NSError * _Nullable * _Nullable)error

Declaration

From

- (BOOL)setWEPKey:(NSData *)key flags:(CWCipherKeyFlags)flags index:(NSInteger)index error:(out NSError **)error

- (BOOL)setWEPKey:(NSData * _Nullable)key flags:(CWCipherKeyFlags)flags index:(NSInteger)index error:(out NSError * _Nullable * _Nullable)error

Modified -[CWInterface setWLANChannel:error:]

	Declaration
From	- (BOOL)setWLANChannel:(CWChannel )channel error:(out NSError *)error
To	- (BOOL)setWLANChannel:(CWChannel * _Nonnull)channel error:(out NSError * _Nullable * _Nullable)error

Modified -[CWInterface ssid]

	Declaration
From	- (NSString *)ssid
To	- (NSString * _Nullable)ssid

Modified -[CWInterface ssidData]

	Declaration
From	- (NSData *)ssidData
To	- (NSData * _Nullable)ssidData

Modified -[CWInterface startIBSSModeWithSSID:security:channel:password:error:]

	Declaration
From	- (BOOL)startIBSSModeWithSSID:(NSData )ssidData security:(CWIBSSModeSecurity)security channel:(NSUInteger)channel password:(NSString )password error:(out NSError **)error
To	- (BOOL)startIBSSModeWithSSID:(NSData * _Nonnull)ssidData security:(CWIBSSModeSecurity)security channel:(NSUInteger)channel password:(NSString * _Nullable)password error:(out NSError * _Nullable * _Nullable)error

Declaration

From

- (BOOL)startIBSSModeWithSSID:(NSData *)ssidData security:(CWIBSSModeSecurity)security channel:(NSUInteger)channel password:(NSString *)password error:(out NSError **)error

- (BOOL)startIBSSModeWithSSID:(NSData * _Nonnull)ssidData security:(CWIBSSModeSecurity)security channel:(NSUInteger)channel password:(NSString * _Nullable)password error:(out NSError * _Nullable * _Nullable)error

Modified -[CWInterface supportedWLANChannels]

	Declaration
From	- (NSSet *)supportedWLANChannels
To	- (NSSet<CWChannel > _Nullable)supportedWLANChannels

Modified -[CWInterface wlanChannel]

	Declaration
From	- (CWChannel *)wlanChannel
To	- (CWChannel * _Nullable)wlanChannel

CWNetwork.h

Modified CWNetwork.bssid

	Declaration
From	@property(readonly) NSString *bssid
To	@property(readonly, nullable) NSString *bssid

Modified CWNetwork.countryCode

	Declaration
From	@property(readonly) NSString *countryCode
To	@property(readonly, nullable) NSString *countryCode

Modified CWNetwork.informationElementData

	Declaration
From	@property(readonly) NSData *informationElementData
To	@property(readonly, nullable) NSData *informationElementData

Modified -[CWNetwork isEqualToNetwork:]

	Declaration
From	- (BOOL)isEqualToNetwork:(CWNetwork *)network
To	- (BOOL)isEqualToNetwork:(CWNetwork * _Nonnull)network

Modified CWNetwork.ssid

	Declaration
From	@property(readonly) NSString *ssid
To	@property(readonly, nullable) NSString *ssid

Modified CWNetwork.ssidData

	Declaration
From	@property(readonly) NSData *ssidData
To	@property(readonly, nullable) NSData *ssidData

Modified CWNetwork.wlanChannel

	Declaration
From	@property(readonly) CWChannel *wlanChannel
To	@property(readonly, nonnull) CWChannel *wlanChannel

CWNetworkProfile.h

Modified CWMutableNetworkProfile.ssidData

	Declaration
From	@property(copy) NSData *ssidData
To	@property(copy, nonnull) NSData *ssidData

Modified -[CWNetworkProfile init]

	Declaration
From	- (instancetype)init
To	- (instancetype _Nonnull)init

Modified -[CWNetworkProfile initWithNetworkProfile:]

	Declaration
From	- (instancetype)initWithNetworkProfile:(CWNetworkProfile *)networkProfile
To	- (instancetype _Nonnull)initWithNetworkProfile:(CWNetworkProfile * _Nonnull)networkProfile

Modified -[CWNetworkProfile isEqualToNetworkProfile:]

	Declaration
From	- (BOOL)isEqualToNetworkProfile:(CWNetworkProfile *)networkProfile
To	- (BOOL)isEqualToNetworkProfile:(CWNetworkProfile * _Nonnull)networkProfile

Modified +[CWNetworkProfile networkProfile]

	Declaration
From	+ (instancetype)networkProfile
To	+ (instancetype _Nonnull)networkProfile

Modified +[CWNetworkProfile networkProfileWithNetworkProfile:]

	Declaration
From	+ (instancetype)networkProfileWithNetworkProfile:(CWNetworkProfile *)networkProfile
To	+ (instancetype _Nonnull)networkProfileWithNetworkProfile:(CWNetworkProfile * _Nonnull)networkProfile

Modified CWNetworkProfile.ssid

	Declaration
From	@property(readonly, copy) NSString *ssid
To	@property(readonly, copy, nullable) NSString *ssid

Modified CWNetworkProfile.ssidData

	Declaration
From	@property(readonly, copy) NSData *ssidData
To	@property(readonly, copy, nullable) NSData *ssidData

CWWiFiClient.h

Modified -[CWEventDelegate bssidDidChangeForWiFiInterfaceWithName:]

	Declaration
From	- (void)bssidDidChangeForWiFiInterfaceWithName:(NSString *)interfaceName
To	- (void)bssidDidChangeForWiFiInterfaceWithName:(NSString * _Nonnull)interfaceName

Modified -[CWEventDelegate countryCodeDidChangeForWiFiInterfaceWithName:]

	Declaration
From	- (void)countryCodeDidChangeForWiFiInterfaceWithName:(NSString *)interfaceName
To	- (void)countryCodeDidChangeForWiFiInterfaceWithName:(NSString * _Nonnull)interfaceName

Modified -[CWEventDelegate linkDidChangeForWiFiInterfaceWithName:]

	Declaration
From	- (void)linkDidChangeForWiFiInterfaceWithName:(NSString *)interfaceName
To	- (void)linkDidChangeForWiFiInterfaceWithName:(NSString * _Nonnull)interfaceName

Modified -[CWEventDelegate linkQualityDidChangeForWiFiInterfaceWithName:rssi:transmitRate:]

Declaration

From

- (void)linkQualityDidChangeForWiFiInterfaceWithName:(NSString *)interfaceName rssi:(NSInteger)rssi transmitRate:(double)transmitRate

- (void)linkQualityDidChangeForWiFiInterfaceWithName:(NSString * _Nonnull)interfaceName rssi:(NSInteger)rssi transmitRate:(double)transmitRate

Modified -[CWEventDelegate modeDidChangeForWiFiInterfaceWithName:]

	Declaration
From	- (void)modeDidChangeForWiFiInterfaceWithName:(NSString *)interfaceName
To	- (void)modeDidChangeForWiFiInterfaceWithName:(NSString * _Nonnull)interfaceName

Modified -[CWEventDelegate powerStateDidChangeForWiFiInterfaceWithName:]

	Declaration
From	- (void)powerStateDidChangeForWiFiInterfaceWithName:(NSString *)interfaceName
To	- (void)powerStateDidChangeForWiFiInterfaceWithName:(NSString * _Nonnull)interfaceName

Modified -[CWEventDelegate scanCacheUpdatedForWiFiInterfaceWithName:]

	Declaration
From	- (void)scanCacheUpdatedForWiFiInterfaceWithName:(NSString *)interfaceName
To	- (void)scanCacheUpdatedForWiFiInterfaceWithName:(NSString * _Nonnull)interfaceName

Modified -[CWEventDelegate ssidDidChangeForWiFiInterfaceWithName:]

	Declaration
From	- (void)ssidDidChangeForWiFiInterfaceWithName:(NSString *)interfaceName
To	- (void)ssidDidChangeForWiFiInterfaceWithName:(NSString * _Nonnull)interfaceName

Modified CWWiFiClient.delegate

	Declaration
From	@property(nonatomic, weak) id delegate
To	@property(nonatomic, weak, nullable) id delegate

Modified -[CWWiFiClient init]

	Declaration
From	- (CWWiFiClient *)init
To	- (CWWiFiClient * _Nullable)init

Modified -[CWWiFiClient interface]

	Declaration
From	- (CWInterface *)interface
To	- (CWInterface * _Nullable)interface

Modified +[CWWiFiClient interfaceNames]

	Declaration
From	+ (NSArray *)interfaceNames
To	+ (NSArray<NSString > _Nullable)interfaceNames

Modified -[CWWiFiClient interfaces]

	Declaration
From	- (NSArray *)interfaces
To	- (NSArray<CWInterface > _Nullable)interfaces

Modified -[CWWiFiClient interfaceWithName:]

	Declaration
From	- (CWInterface )interfaceWithName:(NSString )interfaceName
To	- (CWInterface * _Nullable)interfaceWithName:(NSString * _Nullable)interfaceName

Modified +[CWWiFiClient sharedWiFiClient]

	Declaration
From	+ (CWWiFiClient *)sharedWiFiClient
To	+ (CWWiFiClient * _Nonnull)sharedWiFiClient

Modified -[CWWiFiClient startMonitoringEventWithType:error:]

	Declaration
From	- (BOOL)startMonitoringEventWithType:(CWEventType)type error:(out NSError **)error
To	- (BOOL)startMonitoringEventWithType:(CWEventType)type error:(out NSError * _Nullable * _Nullable)error

Modified -[CWWiFiClient stopMonitoringAllEventsAndReturnError:]

	Declaration
From	- (BOOL)stopMonitoringAllEventsAndReturnError:(out NSError **)error
To	- (BOOL)stopMonitoringAllEventsAndReturnError:(out NSError * _Nullable * _Nullable)error

Modified -[CWWiFiClient stopMonitoringEventWithType:error:]

	Declaration
From	- (BOOL)stopMonitoringEventWithType:(CWEventType)type error:(out NSError **)error
To	- (BOOL)stopMonitoringEventWithType:(CWEventType)type error:(out NSError * _Nullable * _Nullable)error