Compute the back-to-front ordering for a registered node under the given model-view. Returns null when the request is stale (the node was re-registered with a newer generation) or the node is unknown (released, or never order-dependent).
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Compute the back-to-front ordering for a registered node under the given model-view. Returns
nullwhen the request is stale (the node was re-registered with a newer generation) or the node is unknown (released, or never order-dependent).