technology/java-spring-boot/src/main/java/org/acme/schooltimetabling/domain/Lesson.java [18:87]:
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    private Long id;

    private String subject;
    private String teacher;
    private String studentGroup;

    @PlanningVariable
    @ManyToOne
    private Timeslot timeslot;

    @PlanningVariable
    @ManyToOne
    private Room room;

    // No-arg constructor required for Hibernate and OptaPlanner
    public Lesson() {
    }

    public Lesson(String subject, String teacher, String studentGroup) {
        this.subject = subject;
        this.teacher = teacher;
        this.studentGroup = studentGroup;
    }

    public Lesson(long id, String subject, String teacher, String studentGroup, Timeslot timeslot, Room room) {
        this(subject, teacher, studentGroup);
        this.id = id;
        this.timeslot = timeslot;
        this.room = room;
    }

    @Override
    public String toString() {
        return subject + "(" + id + ")";
    }

    // ************************************************************************
    // Getters and setters
    // ************************************************************************

    public Long getId() {
        return id;
    }

    public String getSubject() {
        return subject;
    }

    public String getTeacher() {
        return teacher;
    }

    public String getStudentGroup() {
        return studentGroup;
    }

    public Timeslot getTimeslot() {
        return timeslot;
    }

    public void setTimeslot(Timeslot timeslot) {
        this.timeslot = timeslot;
    }

    public Room getRoom() {
        return room;
    }

    public void setRoom(Room room) {
        this.room = room;
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use-cases/school-timetabling/src/main/java/org/acme/schooltimetabling/domain/Lesson.java [19:87]:
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    private Long id;

    private String subject;
    private String teacher;
    private String studentGroup;

    @PlanningVariable
    @ManyToOne
    private Timeslot timeslot;
    @PlanningVariable
    @ManyToOne
    private Room room;

    // No-arg constructor required for Hibernate and OptaPlanner
    public Lesson() {
    }

    public Lesson(String subject, String teacher, String studentGroup) {
        this.subject = subject;
        this.teacher = teacher;
        this.studentGroup = studentGroup;
    }

    public Lesson(long id, String subject, String teacher, String studentGroup, Timeslot timeslot, Room room) {
        this(subject, teacher, studentGroup);
        this.id = id;
        this.timeslot = timeslot;
        this.room = room;
    }

    @Override
    public String toString() {
        return subject + "(" + id + ")";
    }

    // ************************************************************************
    // Getters and setters
    // ************************************************************************

    public Long getId() {
        return id;
    }

    public String getSubject() {
        return subject;
    }

    public String getTeacher() {
        return teacher;
    }

    public String getStudentGroup() {
        return studentGroup;
    }

    public Timeslot getTimeslot() {
        return timeslot;
    }

    public void setTimeslot(Timeslot timeslot) {
        this.timeslot = timeslot;
    }

    public Room getRoom() {
        return room;
    }

    public void setRoom(Room room) {
        this.room = room;
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