if (newRoom != null) {
if (!wasFinished()) {
if (lessonSpaceOccupation == null) {
lessonSpaceOccupation = new LessonSpaceOccupation(newRoom, this);
} else {
lessonSpaceOccupation.edit(newRoom);
}
}
} else {
if (lessonSpaceOccupation != null) {
lessonSpaceOccupation.delete();