如何正确地将此函数从 Obj-c 转换为 Swift __attribute__((nonnull(1)));

Question

下午好，我是一名新手开发人员，我的任务是将库从 Obj-c 翻译成 Swift

- (id<ACReusableObject>)dequeueReusableObjectWithIdentifier:(NSString *)identifier __attribute__((nonnull(1)));

整个文件看起来像这样

#import <Foundation/Foundation.h>
#import <UIKit/UIKit.h>
#import "ACReusableObject.h"


extern NSString * const ACReuseQueueEmptyException;


@interface ACReuseQueue : NSObject

+ (instancetype)defaultQueue;

@property (nonatomic, assign) NSUInteger maxUnusedCount;

- (void)enqueueReusableObject:(id<ACReusableObject>)reusableObject;

- (id<ACReusableObject>)dequeueReusableObjectWithIdentifier:(NSString *)identifier __attribute__((nonnull(1)));

- (void)registerNib:(UINib *)nib forObjectReuseIdentifier:(NSString *)identifier __attribute((nonnull(1,2)));

- (void)registerNibWithName:(NSString *)nibName bundle:(NSBundle *)nibBundle forObjectReuseIdentifier:(NSString *)identifier __attribute((nonnull(1,3)));

- (void)registerClass:(Class)objectClass forObjectReuseIdentifier:(NSString *)identifier __attribute((nonnull(2)));


@property (nonatomic, assign, readonly) NSUInteger unusedCount;
@property (nonatomic, assign, readonly) NSUInteger usedCount;
@property (nonatomic, assign, readonly) NSUInteger count;

- (void)removeAllUnusedObjects;

@end

请告诉我如何正确编写这个函数。

另外，如果您有任何更好的方法，请写信给我！我会非常感谢你！ 谢谢。

我为此使用了Objc2Swift.js，但我无法转换一个文件，它在这一行给出了语法错误