Summary: Pull Request resolved: https://github.com/facebook/yoga/pull/1581 This is better than just trusting the order of the measure func call. Now each measure function I/O is associated with a node in the JSON. Reviewed By: NickGerleman Differential Revision: D53776790 fbshipit-source-id: 793cf2d9cbf6f663d24848af0af30aa297614eea