Learn/C++/C++ Advanced/Coroutines from First Principles/Checkpoint: Coroutines/Coroutine GauntletCoroutine GauntletChallenge on lesson: Checkpoint: CoroutinesInstructionsCodeOutputImplement Generator<T> + counter (as in the lesson) and the evens filtering adapter (consumes src by move).Difficulty: advancedSubmitPress Submit to check your solution.Back to lesson: Checkpoint: Coroutines