function _closePane(index) {
            if (index === 0) {
                _closePanes();

                return;
            }

            if (angular.isUndefined(toggledPanes[index])) {
                return;
            }

            _closePane(index + 1);

            if (lxSelect.choicesViewSize === 'large') {
                lxSelect.panes.splice(toggledPanes[index].position, 1);
            } else {
                lxSelect.openedPanes.splice(toggledPanes[index].position, 1);
            }

            delete toggledPanes[index];
        }
Close the given panes (and all of its children panes).

@param {number} index The index of the pane to close.