function _clearCurrentDocument() {
        // If editor already blank, do nothing
        if (!_currentDocument) {
            return;
        }
        
        // Change model & dispatch event
        _currentDocument = null;
        $(exports).triggerHandler("currentDocumentChange");
        // (this event triggers EditorManager to actually clear the editor UI)
    }
Changes currentDocument to null, causing no full Editor to be shown in the UI