@interface PSSystemConfiguration : NSObject { struct __SCPreferences { } *_prefs; } + (id)sharedInstance; - (void)dealloc; - (void)cleanupPrefs; - (struct __CFString { } *)dataServiceID; - (struct __CFString { } *)getServiceIDForPDPContext:(unsigned int)a0; - (id)interfaceConfigurationValueForKey:(struct __CFString { } *)a0 serviceID:(struct __CFString { } *)a1; - (id)protocolConfiguration:(struct __CFString { } *)a0 serviceID:(struct __CFString { } *)a1; - (id)protocolConfigurationValueForKey:(struct __CFString { } *)a0 protocolType:(struct __CFString { } *)a1 serviceID:(struct __CFString { } *)a2; - (void)setInterfaceConfigurationValue:(id)a0 forKey:(struct __CFString { } *)a1 serviceID:(struct __CFString { } *)a2; - (void)setProtocolConfiguration:(id)a0 protocolType:(struct __CFString { } *)a1 serviceID:(struct __CFString { } *)a2; - (void)setProtocolConfigurationValue:(id)a0 forKey:(struct __CFString { } *)a1 protocolType:(struct __CFString { } *)a2 serviceID:(struct __CFString { } *)a3; - (unsigned char)synchronizeForWriting:(BOOL)a0; - (struct __CFString { } *)voicemailServiceID; @end