kDebugWarning top-level constant

Implementation

const String kDebugWarning = '''
┏╍╍╍╍╍╍╍╍╍╍╍╍╍╍╍╍╍╍╍╍╍╍╍╍╍╍╍╍╍╍╍╍╍╍╍╍╍╍╍╍╍╍╍╍╍╍╍╍╍╍╍╍╍╍╍┓
┇ ⚠    THIS BENCHMARK IS BEING RUN IN DEBUG MODE     ⚠  ┇
┡╍╍╍╍╍╍╍╍╍╍╍╍╍╍╍╍╍╍╍╍╍╍╍╍╍╍╍╍╍╍╍╍╍╍╍╍╍╍╍╍╍╍╍╍╍╍╍╍╍╍╍╍╍╍╍┦
│                                                       │
│  Numbers obtained from a benchmark while asserts are  │
│  enabled will not accurately reflect the performance  │
│  that will be experienced by end users using release  ╎
│  builds. Benchmarks should be run using this command  ╎
│  line:  "flutter run --profile test.dart" or          ┊
│  or "flutter drive --profile -t test.dart".           ┊
│                                                       ┊
└─────────────────────────────────────────────────╌┄┈  🐢
''';