curl -X POST https://api.box.com/2.0/folders/4353455/copy \
     -H 'Authorization: Bearer <ACCESS_TOKEN>" '
     -H 'Content-Type: application/json" '
     -d '{
       "parent": {
         "id": "345345"
       }
     }'

// Copy folder 11111 into folder 22222
var requestParams = new BoxFolderRequest()
{
    Id = "11111",
    Parent = new BoxRequestEntity()
    {
        Id = "22222"
    }
};
BoxFolder folderCopy = await client.FoldersManager.CopyAsync(requestParams);

BoxFolder folder = new BoxFolder(api, "id1");
BoxFolder destination = new BoxFolder(api, "id2");
folder.copy(destination);

folder_id = '22222'
destination_folder_id = '44444'

folder_to_copy = client.folder(folder_id)
destination_folder = client.folder(destination_folder_id)

folder_copy = folder_to_copy.copy(destination_folder)
print('Folder "{0}" has been copied into folder "{1}"'.format(folder_copy.name, folder_copy.parent.name))

client.folders.copy('11111', '22222')
    .then(folderCopy => {
       /* folderCopy -> {
            type: 'folder',
            id: '1234567',
            sequence_id: '0',
            etag: '0',
            name: 'Pictures from 2017',
            created_at: '2012-12-12T10:53:43-08:00',
            modified_at: '2012-12-12T11:15:04-08:00',
            description: 'Some pictures I took',
            size: 629644,
            path_collection: 
            { total_count: 1,
                entries: 
                [ { type: 'folder',
                    id: '0',
                    sequence_id: null,
                    etag: null,
                    name: 'All Files' },
                  { type: 'folder',
                    id: '22222',
                    sequence_id: '3',
                    etag: '3',
                    name: 'Archives' } ] },
            created_by: 
            { type: 'user',
                id: '22222',
                name: 'Example User'
                login: 'user@example.com' },
            modified_by: 
            { type: 'user',
                id: '22222',
                name: 'Example User',
                login: 'user@example.com' },
            owned_by: 
            { type: 'user',
                id: '22222',
                name: 'Example User',
                login: 'user@example.com' },
            shared_link: null,
            parent: 
            { type: 'folder',
                id: '22222',
                sequence_id: '3',
                etag: '3',
                name: 'Archives' },
            item_status: 'active',
            item_collection: 
            { total_count: 1,
                entries: 
                [ { type: 'file',
                    id: '44444',
                    sequence_id: '0',
                    etag: '0',
                    sha1: '134b65991ed521fcfe4724b7d814ab8ded5185dc',
                    name: 'tigers.jpeg' } ],
                offset: 0,
                limit: 100 } }
        */
    });

client.folders.copy(
    folderId: "22222",
    destinationFolderID: "12345"
) { (result: Result<Folder, BoxSDKError>) in
    guard case let .success(folderCopy) = result else {
        print("Error copying folder")
        return
    }

    print("Copied folder \(folderCopy.name) to destination \(folderCopy.parent?.name)")
}