package design.model; import com.fasterxml.jackson.annotation.JsonIdentityReference; public class Swing { private final int distance; @JsonIdentityReference(alwaysAsId = true) private final Club clubUsed; public Swing(int distance, Club clubUsed) { this.distance = distance; this.clubUsed = clubUsed; } public int getDistance() { return distance; } public Club getClubUsed() { return clubUsed; } }