Mark two set method in SDWebImageDownloader as property

SDWebImage/SDWebImageDownloader.h

@@ -139,19 +139,26 @@ typedef SDHTTPHeadersDictionary * _Nullable (^SDWebImageDownloaderHeadersFilterB
  */
 @property (readonly, nonatomic, nonnull) NSURLSessionConfiguration *sessionConfiguration;
 
+/**
+ * Gets/Sets a subclass of `SDWebImageDownloaderOperation` as the default
+ * `NSOperation` to be used each time SDWebImage constructs a request
+ * operation to download an image.
+ *
+ * @param operationClass The subclass of `SDWebImageDownloaderOperation` to set
+ *        as default. Passing `nil` will revert to `SDWebImageDownloaderOperation`.
+ */
+@property (assign, nonatomic, nullable) Class operationClass;
+
+/**
+ * Gets/Sets the download queue suspension state.
+ */
+@property (assign, nonatomic, getter=isSuspended) BOOL suspended;
 
 /**
  * Changes download operations execution order. Default value is `SDWebImageDownloaderFIFOExecutionOrder`.
  */
 @property (assign, nonatomic) SDWebImageDownloaderExecutionOrder executionOrder;
 
-/**
- *  Singleton method, returns the shared instance
- *
- *  @return global shared instance of downloader class
- */
-+ (nonnull instancetype)sharedDownloader;
-
 /**
  *  Set the default URL credential to be set for request operations.
  */
@@ -175,6 +182,13 @@ typedef SDHTTPHeadersDictionary * _Nullable (^SDWebImageDownloaderHeadersFilterB
  */
 @property (nonatomic, copy, nullable) SDWebImageDownloaderHeadersFilterBlock headersFilter;
 
+/**
+ *  Singleton method, returns the shared instance
+ *
+ *  @return global shared instance of downloader class
+ */
++ (nonnull instancetype)sharedDownloader;
+
 /**
  * Creates an instance of a downloader with specified session configuration.
  * @note `timeoutIntervalForRequest` is going to be overwritten.
@@ -197,16 +211,6 @@ typedef SDHTTPHeadersDictionary * _Nullable (^SDWebImageDownloaderHeadersFilterB
  */
 - (nullable NSString *)valueForHTTPHeaderField:(nullable NSString *)field;
 
-/**
- * Sets a subclass of `SDWebImageDownloaderOperation` as the default
- * `NSOperation` to be used each time SDWebImage constructs a request
- * operation to download an image.
- *
- * @param operationClass The subclass of `SDWebImageDownloaderOperation` to set 
- *        as default. Passing `nil` will revert to `SDWebImageDownloaderOperation`.
- */
-- (void)setOperationClass:(nullable Class)operationClass;
-
 /**
  * Creates a SDWebImageDownloader async downloader instance with a given URL
  *
@@ -263,11 +267,6 @@ typedef SDHTTPHeadersDictionary * _Nullable (^SDWebImageDownloaderHeadersFilterB
  */
 - (void)cancel:(nullable SDWebImageDownloadToken *)token;
 
-/**
- * Sets the download queue suspension state
- */
-- (void)setSuspended:(BOOL)suspended;
-
 /**
  * Cancels all download operations in the queue
  */

SDWebImage/SDWebImageDownloader.m

@@ -36,7 +36,6 @@
 
 @property (strong, nonatomic, nonnull) NSOperationQueue *downloadQueue;
 @property (weak, nonatomic, nullable) NSOperation *lastAddedOperation;
-@property (assign, nonatomic, nullable) Class operationClass;
 @property (strong, nonatomic, nonnull) NSMutableDictionary<NSURL *, SDWebImageDownloaderOperation *> *URLOperations;
 @property (strong, nonatomic, nullable) SDHTTPHeadersMutableDictionary *HTTPHeaders;
 @property (strong, nonatomic, nonnull) dispatch_semaphore_t operationsLock; // a lock to keep the access to `URLOperations` thread-safe
@@ -309,6 +308,10 @@
     return token;
 }
 
+- (BOOL)isSuspended {
+    return self.downloadQueue.isSuspended;
+}
+
 - (void)setSuspended:(BOOL)suspended {
     self.downloadQueue.suspended = suspended;
 }

Tests/Tests/SDWebImageDownloaderTests.m

@@ -17,7 +17,6 @@
  *  Category for SDWebImageDownloader so we can access the operationClass
  */
 @interface SDWebImageDownloader ()
-@property (assign, nonatomic, nullable) Class operationClass;
 @property (strong, nonatomic, nonnull) NSOperationQueue *downloadQueue;
 
 - (nullable SDWebImageDownloadToken *)addProgressCallback:(SDWebImageDownloaderProgressBlock)progressBlock