Return an empty IntegerSet if the '(' is not parsed.

PiperOrigin-RevId: 229198934
2 files changed
tree: be9289811a0e3e1bb1dfaff18928e547a7d18918
  1. g3doc/
  2. include/
  3. lib/
  4. test/
  5. tools/
  6. utils/
  7. .clang-format
  8. LICENSE.TXT