### Question:
CanonStateEventImpl implements CanonStateEvent { @Override public String toString() { return "CanonStateEventImpl{" + "cameraRef=" + cameraRef + ", stateEvent=" + stateEvent + ", inEventData=" + inEventData + '}'; } CanonStateEventImpl(final EdsCameraRef cameraRef, final EdsStateEvent stateEvent, final long inEventData); @Override EdsCameraRef getCameraRef(); @Override EdsStateEvent getStateEvent(); @Override long getEventData(); @Override String toString();  }### Answer:
@Test void toStringOk() { Assertions.assertNotNull(canonStateEvent.toString()); }