Yoga debug info (TextureGroup#1253)

* fix SIMULATE_WEB_RESPONSE not imported TextureGroup#449

* Fix to make rangeMode update in right time

* remove uncessary assert

* Fix collection cell editing bug for iOS 9 & 10

* Revert "Fix collection cell editing bug for iOS 9 & 10"

This reverts commit 06e18a1.

* Add description method for yoga.

* Fix comment

Source/ASDisplayNode+Beta.h

@@ -210,6 +210,12 @@ AS_EXTERN void ASDisplayNodePerformBlockOnEveryYogaChild(ASDisplayNode * _Nullab
 
 @end
 
+@interface ASDisplayNode (YogaDebugging)
+
+- (NSString *)yogaTreeDescription;
+
+@end
+
 @interface ASLayoutElementStyle (Yoga)
 
 - (YGNodeRef)yogaNodeCreateIfNeeded;

Source/ASDisplayNode+Yoga.mm

@@ -351,4 +351,20 @@ - (void)calculateLayoutFromYogaRoot:(ASSizeRange)rootConstrainedSize
 
 @end
 
+@implementation ASDisplayNode (YogaDebugging)
+
+- (NSString *)yogaTreeDescription {
+  return [self _yogaTreeDescription:@""];
+}
+
+- (NSString *)_yogaTreeDescription:(NSString *)indent {
+  auto subtree = [NSMutableString stringWithFormat:@"%@%@\n", indent, self.description];
+  for (ASDisplayNode *n in self.yogaChildren) {
+    [subtree appendString:[n _yogaTreeDescription:[indent stringByAppendingString:@"| "]]];
+  }
+  return subtree;
+}
+
+@end
+
 #endif /* YOGA */