lib/control.dart files in this directory are used by
runTracingTests function to check whether aspects of the tracing logic in the framework get compiled out in profile and release builds. They’re not meant to be run directly.
The strings in these files are used in
The tests in this folder must be run with
flutter test --enable-vmservice, since they test that trace data is written to the timeline by connecting to the observatory.
These tests will fail if run without this flag.