as element:

<widget:file-hierarchy
       files="{mixed}"
       on-submit="{function}"
       button-label="{string}">
</widget:file-hierarchy>

Parameters

Param	Type	Details
files	mixed	The hierarchy of files
on-submit	function	A function to call when the submit button is clicked
button-label	string	Label for the button, button only shows if a label is not empty