New Form with one draft

The user access to a new form page and this form has one draft. Orbeon is going to ask the user if he wants to open the saved draft or open a form from scratch.
http://orbeonIP:port/orbeon/fr/{app}/{formName}/new Orbeon POST request body:

<search >
	<drafts for-never-saved-document="true">only</drafts>
	<page-size>10</page-size>
	<page-number>1</page-number>
	<lang>en</lang>
</search>