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f2ffea8ae1c1b152b63bf561375cfb6eb6b9dbe5 by Derek Mauro <dmauro@google.com>:

Internal change

PiperOrigin-RevId: 432180490
Change-Id: I5e318e1d06fe26eee08920fe39f8a6285eb8e217

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e5d0de4b3293833eab3f77252a091ac4ed74b210 by Derek Mauro <dmauro@google.com>:

absl::optional - Add a workaround for an internal compiler error in GCC5 though GCC10

PiperOrigin-RevId: 432047437
Change-Id: I524a9098dadc116d8a423dd66f7ec5ee894f2874
GitOrigin-RevId: f2ffea8ae1c1b152b63bf561375cfb6eb6b9dbe5