How change default rendering of plugin? How to take current information about node after drag and drop?

[nurzhannogerbek]

First of all thanks for this plugin! :)

I have some questions.

1. I have tree with next structure:

<ol id="documents" class="list-group">
    <li class="list-group-item"> <!-- B -->
        <div>Some content</div>
    </li>

    <li class="list-group-item">
        <div>Some content</div>
        <ol class="list-group">
            <li class="list-group-item"> <!-- A -->
                <div>Some content</div>
            </li>
            <li class="list-group-item">
                <div>Some content</div>
            </li>
        </ol>
    </li>
</ol>

When I remove node A and want to make it child of element B by default nestedSortable plugin put <ol>. I need to put <ol class="list-group">. Is it possible to change this default behavior?!

2. Is it possible to take JSON with current information about node after drag and drop? Lets say information like: position, level, parent_id of nodes? Can you show me example if it possible, please? :)