public field (xml serialization)

python/educational/interactive-learning/src/com/jetbrains/edu/learning/courseGeneration/StudyGenerator.java

@@ -128,7 +128,7 @@ public class StudyGenerator {
    * Initializes state of course
    */
   public static void initCourse(@NotNull final Course course, boolean isRestarted) {
-    for (Lesson lesson : course.lessons) {
+    for (Lesson lesson : course.getLessons()) {
       initLesson(lesson, course, isRestarted);
     }
   }

python/educational/interactive-learning/src/com/jetbrains/edu/learning/courseGeneration/StudyProjectGenerator.java

@@ -114,7 +114,7 @@ public class StudyProjectGenerator {
     flushCourseJson(course, courseDirectory);
 
     int lessonIndex = 1;
-    for (Lesson lesson : course.lessons) {
+    for (Lesson lesson : course.getLessons()) {
       final File lessonDirectory = new File(courseDirectory, EduNames.LESSON + String.valueOf(lessonIndex));
       FileUtil.createDirectory(lessonDirectory);
       int taskIndex = 1;

python/educational/interactive-learning/src/com/jetbrains/edu/learning/stepic/StudyStepicConnector.java

@@ -64,12 +64,11 @@ public class StudyStepicConnector {
     course.setAuthor(info.getAuthor());
     course.setDescription(info.getDescription());
     course.setName(info.getName());
-    course.lessons = new ArrayList<Lesson>();
     course.setLanguage("Python");  // TODO: get from stepic
     course.setUpToDate(true);  // TODO: get from stepic
     try {
       for (Integer section : info.sections) {
-        course.lessons.addAll(getLessons(section));
+        course.addLessons(getLessons(section));
       }
       return course;
     }

python/educational/src/com/jetbrains/edu/courseFormat/Course.java

@@ -23,6 +23,9 @@ public class Course {
   public void setLessons(List<Lesson> lessons) {
     this.lessons = lessons;
   }
+  public void addLessons(List<Lesson> lessons) {
+    lessons.addAll(lessons);
+  }
 
   public void addLesson(@NotNull final Lesson lesson) {
     lessons.add(lesson);