getRegisteredMutationObserversOfType   43 Source/core/dom/MutationObserverInterestGroup.cpp     target.getRegisteredMutationObserversOfType(observers, type, attributeName);
getRegisteredMutationObserversOfType  649 Source/core/dom/Node.h     void getRegisteredMutationObserversOfType(HashMap<MutationObserver*, MutationRecordDeliveryOptions>&, MutationObserver::MutationType, const QualifiedName* attributeName);