function getFocusedMultiRangeInlineEditor() {
        var focusedWidget = EditorManager.getFocusedInlineWidget();
        if (focusedWidget instanceof MultiRangeInlineEditor) {
            return focusedWidget;
        } else {
            return null;
        }
    }
Returns the currently focused MultiRangeInlineEditor.
@return {MultiRangeInlineEditor}