7 files declare their use of SensorThresholds in Monitoring 7

SensorCronLastRunAge.php in lib/Drupal/monitoring/Sensor/Sensors/SensorCronLastRunAge.php

Contains \Drupal\monitoring\Sensor\Sensors\SensorCronLastRunAge.

SensorDatabaseAggregator.php in lib/Drupal/monitoring/Sensor/Sensors/SensorDatabaseAggregator.php

Contains \Drupal\monitoring\Sensor\Sensors\SensorDatabaseAggregator.

SensorElysiaCron.php in lib/Drupal/monitoring/Sensor/Sensors/SensorElysiaCron.php

Contains \Drupal\monitoring\Sensor\Sensors\SensorElysiaCron.

SensorQueue.php in lib/Drupal/monitoring/Sensor/Sensors/SensorQueue.php

Contains \Drupal\monitoring\Sensor\Sensors\SensorQueue.

SensorSearchApi.php in lib/Drupal/monitoring/Sensor/Sensors/SensorSearchApi.php

Contains \Drupal\monitoring\Sensor\Sensors\SensorSearchApi.

SensorSimplenewsPending.php in lib/Drupal/monitoring/Sensor/Sensors/SensorSimplenewsPending.php

Contains \Drupal\monitoring\Sensor\Sensors\SensorSimplenewsPending.

TestSensor.php in test/lib/Drupal/monitoring_test/Sensor/Sensors/TestSensor.php

Contains \Drupal\monitoring_test\Sensor\Sensors\TestSensor.