* Gets the next DOM ID on the tree path from the supplied `ancestorID` to the * supplied `destinationID`. If they are equal, the ID is returned. * * @param {string} ancestorID ID of an ancestor node of `destinationID`. * @param {string} destinationID ID of the destination node. * @return {
(ancestorID, destinationID)
source not stored for this graph (policy: none)
nothing calls this directly
no test coverage detected