def METHOD_NAME(self):
    """
    Returns the index of this view, even if the originally viewed operator (and its slots) have been resized in the meantime.
    """
    multislot = getattr(self.__op, self.__referenceSlotName)
    innerslot = getattr(self, self.__referenceSlotName)
    try:
        return multislot.index(innerslot)
    except ValueError:
        # If this subview has expired (the corresponding subslots have
        #  been removed from the operator), then return -1
        return -1