PropertyAtFast
Property* ownProperty = PropertyAtFast(i);
Property* otherProperty = other.PropertyAtFast(i);
Property* p = PropertyAtFast(i);
Property* p = PropertyAtFast(i);
Property* PropertyAtFast(int32 index) const;
Property* p = object->PropertyAtFast(i);
const Property* p = fPropertyObject->PropertyAtFast(i);