The class under models package implements serializable interface to support native image(GraalVM).

Author: nilchina

src/main/java/org/gitlab4j/api/models/ImportStatus.java

@@ -1,5 +1,6 @@
 package org.gitlab4j.api.models;
 
+import java.io.Serializable;
 import java.util.Date;
 
 import org.gitlab4j.api.utils.JacksonJson;
@@ -8,7 +9,8 @@
 import com.fasterxml.jackson.annotation.JsonCreator;
 import com.fasterxml.jackson.annotation.JsonValue;
 
-public class ImportStatus {
+public class ImportStatus implements Serializable {
+    private static final long serialVersionUID = -5437477855918094477L;
 
     /**
      * Enum representing the status of the import.