21     fParent = fFirstChild = fNextSibling = fPrevSibling = nullptr;  in SkView()
256                 child = child->fNextSibling;  in moveFocus()
259             child = parent->fNextSibling;  in moveFocus()
505     if (fNextSibling != this) {   // do we have any siblings  in detachFromParent_NoLayout()
506         fNextSibling->fPrevSibling = fPrevSibling;  in detachFromParent_NoLayout()
507         fPrevSibling->fNextSibling = fNextSibling;  in detachFromParent_NoLayout()
508         next = fNextSibling;  in detachFromParent_NoLayout()
515     fParent = fNextSibling = fPrevSibling = nullptr;  in detachFromParent_NoLayout()
542         child->fNextSibling = child;  in attachChildToBack()
545         child->fNextSibling = fFirstChild;  in attachChildToBack()
547         fFirstChild->fPrevSibling->fNextSibling = child;  in attachChildToBack()
573         child->fNextSibling = child;  in attachChildToFront()
576         child->fNextSibling = fFirstChild;  in attachChildToFront()
578         fFirstChild->fPrevSibling->fNextSibling = child;  in attachChildToFront()
737         SkView* next = fChild->fNextSibling;  in next()
753         SkASSERT(fNextSibling);  in validate()
756         bool nextNull = nullptr == fNextSibling;  in validate()
757         bool prevNull = nullptr == fNextSibling;  in validate()