Fix attachment to files:files metadata by REST API

package org.nuxeo;import java.io.File;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;import org.nuxeo.client.NuxeoClient;
import org.nuxeo.client.NuxeoClient.Builder;
import org.nuxeo.client.objects.Document;
import org.nuxeo.client.objects.blob.FileBlob;
import org.nuxeo.client.objects.upload.BatchBlob;
import org.nuxeo.client.objects.upload.BatchUpload;
import org.nuxeo.client.objects.upload.BatchUploadManager;public class TestMultiFileBatch {    public static void main(String[] args) {
        Builder builder = new NuxeoClient.Builder();
        builder.url("http://localhost:8080/nuxeo").authentication("Administrator", "Administrator").schemas(
                "*").connectTimeout(0).timeout(0);
        NuxeoClient client = builder.connect();        // Upload 2 files for attachments
        BatchUploadManager batchUploadManager = client.batchUploadManager();
        BatchUpload batchUpload = batchUploadManager.createBatch();
        // Upload attachment 1
        File attachment1 = new File("/tmp/file1.png");
        FileBlob attachmentBlob1 = new FileBlob(attachment1);
        batchUpload = batchUpload.upload("1", attachmentBlob1);
        // Upload attachment 2
        File attachment2 = new File("/tmp/file2.png");
        FileBlob attachmentBlob2 = new FileBlob(attachment2);
        batchUpload = batchUpload.upload("2", attachmentBlob2);        Document doc = Document.createWithName("Doc created by Java Client", "File");
        List<BatchBlob> bus = new ArrayList<>();
        bus.add(batchUpload.getBatchBlob("1"));
        bus.add(batchUpload.getBatchBlob("2"));
        doc.setPropertyValue("file:content", batchUpload.getBatchBlob("1"));
        doc.setPropertyValue("files:files", bus);
        doc.setPropertyValue("dc:title", (new Date()).toLocaleString());
//        doc.setPropertyValue("files:files", batchUpload.fetchBatchUploads());
        doc = client.repository().createDocumentByPath("/default-domain/UserWorkspaces/Administrator", doc);
    }
    
}