如何在PHP API上使用DocuSigneSignModelFolderItemV2中的setSender

我有一个docuSign-dev沙盒。我能够正确登录并发送信封，没有任何问题。但是现在，我正在尝试使用这个类中的方法setSenderName、setSenderEmail和setCompanyName：

class FolderItemV2 implements ArrayAccess
{
     static $swaggerTypes = array(
    'owner_name' => 'string',
    'envelope_id' => 'string',
    'envelope_uri' => 'string',
    'status' => 'string',
    'last_modified_date_time' => 'string',
    'sender_user_id' => 'string',
    'sender_name' => 'string',
    'sender_email' => 'string',
    'sender_company' => 'string',
    'created_date_time' => 'string',
    'sent_date_time' => 'string',
    'completed_date_time' => 'string',
    'subject' => 'string',
    'expire_date_time' => 'string',
    'folder_id' => 'string',
    'folder_uri' => 'string',
    'recipients' => ''DocuSign'eSign'Model'Recipients',
    'recipients_uri' => 'string',
    'is21_cfr_part11' => 'string',
    'is_universal_signature_envelope' => 'string'
     );

方法已在FolderItemV2.php上定义(https://github.com/docusign/DocuSign-PHP-Client)

我的代码很像这样：

$envelopeApi = new DocuSign'eSign'Api'EnvelopesApi($apiClient);
$envelop_definition = new DocuSign'eSign'Model'EnvelopeDefinition();
$envelop_definition->setEmailSubject("[Test]");
$envelop_definition->setStatus("sent");
$envelop_definition->setRecipients($recipients);
$envelop_definition->setDocuments(array($document, $document2, $document3));
$envelop_definition->setEmailSettings($emailSettings);

现在，我试过了，但我不知道如何将文件夹放入信封，无论如何，当我添加这些行时，它不会发送信封，也不会在$folder var:中显示任何内容

$folder = new DocuSign'eSign'Model'FolderItemV2();
$folder->setFolderId('1');
$folder->setSenderName('NameABC');
$folder->setSenderEmail('acbc@abc.com');
$folder->setSenderCompany('ComapnayABC');

Debugmode打开，它显示以下消息：

< *X-DocuSign-SDK: PHP Accept: application/json Content-Type: application/json 
< HTTP/1.1 200 OK 
< Cache-Control: no-cache 
< Content-Length: 692 
< Content-Type: application/json; charset=utf-8 
< Date: Thu, 19 May 2016 04:29:33 GMT 
< Strict-Transport-Security: max-age=31536000; includeSubDomains 
< * Connection #3 to host demo.docusign.net left intact*

我已经阅读了所有的文档，如果有人已经看过了，我真的很感激能给你一个提示。提前感谢！