@@ -36,9 +36,9 @@
  *	  specified object.
  *
  * @param object The object which is checked for being in the collection
  * @return A boolean whether the collection contains the specified object
  */
-- (bool)containsObject: (nullable id)object;
+- (bool)containsObject: (id)object;
 @end
 
 OF_ASSUME_NONNULL_END