From b7a92b2947aaeccfdf49cc759aa31d5949cb281f Mon Sep 17 00:00:00 2001
From: Michael Schneider <mischneider1@gmail.com>
Date: Tue, 15 Mar 2016 16:30:23 -0700
Subject: [PATCH] Add documentation for visibilityDidChange:

---
 AsyncDisplayKit/ASDisplayNode+Subclasses.h | 5 +++++
 AsyncDisplayKit/ASDisplayNode.mm           | 1 +
 2 files changed, 6 insertions(+)

diff --git a/AsyncDisplayKit/ASDisplayNode+Subclasses.h b/AsyncDisplayKit/ASDisplayNode+Subclasses.h
index 023567d9a2..d7dad4cbc8 100644
--- a/AsyncDisplayKit/ASDisplayNode+Subclasses.h
+++ b/AsyncDisplayKit/ASDisplayNode+Subclasses.h
@@ -231,6 +231,11 @@ NS_ASSUME_NONNULL_BEGIN
  */
 - (void)interfaceStateDidChange:(ASInterfaceState)newState fromState:(ASInterfaceState)oldState ASDISPLAYNODE_REQUIRES_SUPER;
 
+/**
+ * @abstract Called whenever the visiblity of the node changed.
+ *
+ * @discussion Subclasses may use this to monitor when they become visible.
+ */
 - (void)visibilityDidChange:(BOOL)isVisible ASDISPLAYNODE_REQUIRES_SUPER;
 
 /**
diff --git a/AsyncDisplayKit/ASDisplayNode.mm b/AsyncDisplayKit/ASDisplayNode.mm
index 256e9e7d03..1421d8fa27 100644
--- a/AsyncDisplayKit/ASDisplayNode.mm
+++ b/AsyncDisplayKit/ASDisplayNode.mm
@@ -1982,6 +1982,7 @@ void recursivelyTriggerDisplayForLayer(CALayer *layer, BOOL shouldBlock)
 
 - (void)visibilityDidChange:(BOOL)isVisible
 {
+    // subclass override
 }
 
 /**