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Joe Savona
8790324562
I ran into the same issue that @poteto and @gsathya (and probably @mofeiZ) have run into: "Duplicate declaration of '$'" caused by Babel visiting a function twice despite our calling `skip()`. This PR keeps a set of nodes that we have already visited to avoid visiting them again, as a workaround for skip not working. # Test Plan Synced to www and confirmed that the previous bug no longer reproduces, and the compiled output looks sane.