public static boolean equals(final Object object1, final Object object2) {
        if (object1 == object2) {
            return true;
        }
        if (object1 == null || object2 == null) {
            return false;
        }
        return object1.equals(object2);
    }

    /**
     * Returns the hash code of the specified object, or 0 if the object is null.
     *
     * @param obj the object
     * @return the hash code or 0

		t.Fatal(err)
	}

	bucket := "bucket"
	object := "object"
	opts := ObjectOptions{}
	// Create object "obj" under bucket "bucket".
	_, err = obj.PutObject(ctx, bucket, object, mustGetPutObjReader(t, bytes.NewReader([]byte("abcd")), int64(len("abcd")), "", ""), opts)
	if err != nil {
		t.Fatal(err)
	}
	// Upload a good object
	_, err = obj.DeleteObject(ctx, bucket, object, ObjectOptions{})
	if err != nil {
		t.Fatal(err)

		for i, disk := range disks {
			if disk == OfflineDisk {
				continue
			}
			disk.Delete(context.Background(), "testbucket", "object", DeleteOptions{
				Recursive: false,
				Immediate: false,
			})
			writers[i] = newBitrotWriter(disk, "", "testbucket", "object", erasure.ShardFileSize(size), DefaultBitrotAlgorithm, erasure.ShardSize())
		}

		t.Errorf("Open err:%v", err)
	}

	type Object1 struct{}
	type Object2 struct {
		Field1 string
	}
	type Object3 struct {
		Field2 string
	}
	db.Migrator().DropTable("objects")

	err = db.Table("objects").AutoMigrate(&Object1{})
	if err != nil {
		t.Errorf("AutoMigrate err:%v", err)
	}

	err = db.Table("objects").AutoMigrate(&Object2{})
	if err != nil {

    return java.util.Objects.hash(objects);
  }

  private Objects() {}

    return java.util.Objects.hash(objects);
  }

  private Objects() {}

						Bucket:    bucket,
						Object:    object,
						VersionID: goi.VersionID,
					}
				}
				return goi, ObjectNotFound{
					Bucket: bucket,
					Object: object,
				}
			}
		}
	}

	//  Determine whether to mark object deleted for replication
	markDelete := goi.VersionID != ""

	// Default deleteMarker to true if object is under versioning

		// do an additional verification whether object exists when object is deletemarker and request
		// is from replication
		if opts.CheckDMReplicationReady {
			topts := opts
			topts.VersionID = ""
			goi, gerr := getObjectInfo(ctx, bucket, object, topts)
			if gerr == nil || goi.VersionID != "" { // object layer returned more info because object is deleted
				w.Header().Set(xhttp.MinIOTargetReplicationReady, "true")

				// Read last byte of object
				fmt.Sprintf("bytes=-%d", 1),
				// Read all but first byte of object
				"bytes=1-",
				// Read first half of object
				fmt.Sprintf("bytes=%d-%d", 0, objLen/2),
				// Read last half of object
				fmt.Sprintf("bytes=-%d", objLen/2),
				// Read middle half of object
				fmt.Sprintf("bytes=%d-%d", objLen/4, objLen*3/4),
				// Read 100MiB of the object from the beginning

	AskDisks     string                   // dictates how many disks are being listed
	VersionsSort WalkVersionsSortOrder    // sort order for versions of the same object; default: Ascending order in ModTime
	Limit        int                      // maximum number of items, 0 means no limit
}

// ExpirationOptions represents object options for object expiration at objectLayer.
type ExpirationOptions struct {