package io.vehiclehistory.api.model;

public class Location {
    private String state;
    private Country country;

    public String getState() {
        return state;
    }

    public Country getCountry() {
        return country;
    }
}

@@ -35,29 +35,83 @@
 l;%0A%0A
-public class Location
+import java.io.Serializable;%0A%0Apublic class Location implements Serializable
  %7B%0A 

Fix missing serializable