Function yield_step2_callback

tests/test-scheduler-advanced-features.cpp:235–237

* @brief Callback for multi-step yield testing - step 2 */

 * @brief Callback for multi-step yield testing - step 2
 */
void yield_step2_callback() {
    advanced_test_output.push_back("step_2");
}

/**
 * @brief Consumer callback that yields to yield_step2_callback