[WIP] Migrated View Managers over to new architecture

ReactKit/Base/RCTUtils.m

@@ -155,6 +155,31 @@ BOOL RCTClassOverridesInstanceMethod(Class cls, SEL selector)
       return YES;
     }
   }
+  free(methods);
   return NO;
 }
 
+void RCTEnumerateClasses(void (^block)(Class cls))
+{
+  static Class *classes;
+  static unsigned int classCount;
+  static dispatch_once_t onceToken;
+  dispatch_once(&onceToken, ^{
+    classes = objc_copyClassList(&classCount);
+  });
+
+  for (unsigned int i = 0; i < classCount; i++)
+  {
+    Class cls = classes[i];
+    Class superclass = cls;
+    while (superclass)
+    {
+      if (class_conformsToProtocol(superclass, @protocol(NSObject)))
+      {
+        block(cls);
+        break;
+      }
+      superclass = class_getSuperclass(superclass);
+    }
+  }
+}