15 duplicated lines in:
  - integration_tests/nnbd_opted_in/mono_pkg.yaml (1:16, 100%)
  - integration_tests/nnbd_opted_out/mono_pkg.yaml (1:16, 100%)

10 duplicated lines in:
  - integration_tests/nnbd_opted_in/pubspec.yaml (4:13, 76%)
  - integration_tests/nnbd_opted_out/pubspec.yaml (4:13, 76%)