BELayerHierarchyHandle
+ (nullable BELayerHierarchyHandle *)handleWithPort:(mach_port_t)port data:(nonnull NSData *)data error:(NSError * _Nullable * _Nullable)error;
BELayerHierarchyHandle
- (void)encodeWithBlock:(nonnull void (^)(mach_port_t, NSData * _Nonnull))block;
BELayerHierarchyHostingTransactionCoordinator
+ (nullable BELayerHierarchyHostingTransactionCoordinator *)coordinatorWithPort:(mach_port_t)port data:(nonnull NSData *)data error:(NSError * _Nullable * _Nullable)error;
BELayerHierarchyHostingTransactionCoordinator
- (void)encodeWithBlock:(nonnull void (^)(mach_port_t, NSData * _Nonnull))block;