diff --git a/SDWebImage/SDImageCache.h b/SDWebImage/SDImageCache.h
index 623a7274..2f710839 100644
--- a/SDWebImage/SDImageCache.h
+++ b/SDWebImage/SDImageCache.h
@@ -148,6 +148,15 @@ typedef void(^SDWebImageCalculateSizeBlock)(NSUInteger fileCount, NSUInteger tot
 
 #pragma mark - Query and Retrieve Ops
 
+/**
+ *  Async check if image exists in disk cache already (does not load the image)
+ *
+ *  @param key             the key describing the url
+ *  @param completionBlock the block to be executed when the check is done.
+ *  @note the completion block will be always executed on the main queue
+ */
+- (void)diskImageExistsWithKey:(nullable NSString *)key completion:(nullable SDWebImageCheckCacheCompletionBlock)completionBlock;
+
 /**
  * Operation that queries the cache asynchronously and call the completion when done.
  *
@@ -234,15 +243,6 @@ typedef void(^SDWebImageCalculateSizeBlock)(NSUInteger fileCount, NSUInteger tot
  */
 - (void)calculateSizeWithCompletionBlock:(nullable SDWebImageCalculateSizeBlock)completionBlock;
 
-/**
- *  Async check if image exists in disk cache already (does not load the image)
- *
- *  @param key             the key describing the url
- *  @param completionBlock the block to be executed when the check is done.
- *  @note the completion block will be always executed on the main queue
- */
-- (void)diskImageExistsWithKey:(nullable NSString *)key completion:(nullable SDWebImageCheckCacheCompletionBlock)completionBlock;
-
 #pragma mark - Cache Paths
 
 /**