Valentin Shergin 3ecf4eaccb Fabric: ShadowNode::backtrackAncestors(...)
Summary:
We have to have a way to backtrack a pointer to a parent node and this is generalized version of that.
This is the first naive implementations of the algorithm. We will invest in optimizing this later.

Reviewed By: mdvacca

Differential Revision: D12920856

fbshipit-source-id: 9facb4e16a0b5608feb6747df3804952025ef093
2018-11-21 17:16:48 -08:00
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