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<div class="panel panel-default custom-panel expand_collapse_panel-icon" data-id="namespace">
    <div class="panel-heading" data-toggle="collapse" href="#namespaceCollapse" aria-expanded="false" style="width: 70%;">
        <h4 class="panel-title">
            <a>Namespaces</a>
        </h4>
        <div class="btn-group pull-left">
            <button type="button" title="Collapse"><i class="ec-icon fa"></i></button>
        </div>
    </div>
    <div class="panel-actions">
        <button class="btn btn-action btn-sm" data-id="addNameSpace">Add</button>
        <button class="btn btn-action btn-sm" style="display: none;" data-id="saveNameSpace">Save</button>
        <button class="btn btn-action btn-sm" style="display: none;" data-id="cancel">Cancel</button>
    </div>
    <div id="namespaceCollapse" class="panel-collapse collapse">
        <div class="panel-body">
            <div data-id="namespaceTree"></div>
            <div class="editBox" style="display: none;">
                <div class="form-group">
                    <a href="javascript:void(0)" class="btn btn-action btn-sm" data-id="addItem" data-type="addAttrButton">Add New Attribute</a>
                </div>
                <ul class="namespace-tree-parent" data-id="itemView"></ul>
            </div>
        </div>
    </div>
</div>