How to use the cx/util.KeyCode.down function in cx

//TODO: Fix insertion point
                    let below =
                        index < order.length - 1 && e.keyCode === code("O") && !e.shiftKey;
                    nt.order = below
                        ? getNextOrder($task.order, order)
                        : getPrevOrder($task.order, order);

                    set("activeTaskId", nt.id);
                    updateTask(nt);
                    break;

                case KeyCode.up:
                    if (e.ctrlKey) this.moveTaskUp(e, instance);
                    break;

                case KeyCode.down:
                    if (e.ctrlKey) this.moveTaskDown(e, instance);
                    break;

                case KeyCode.right:
                    if (e.ctrlKey) this.moveTaskRight(e, instance);
                    break;

                case KeyCode.left:
                    if (e.ctrlKey) this.moveTaskLeft(e, instance);
                    break;
            }
        },

let id = uid();
                    taskTracker.add({
                        id,
                        listId: $task.listId,
                        order: $task.order + offset,
                        createdDate: new Date().toISOString()
                    }, { suppressUpdate: true, suppressSync: true });
                    taskTracker.reorderList($task.listId);
                    editTask(id);
                    break;

                case KeyCode.up:
                    if (e.ctrlKey) this.moveTaskUp(e, instance);
                    break;

                case KeyCode.down:
                    if (e.ctrlKey) this.moveTaskDown(e, instance);
                    break;

                case KeyCode.right:
                    if (e.ctrlKey) this.moveTaskRight(e, instance);
                    break;

                case KeyCode.left:
                    if (e.ctrlKey) this.moveTaskLeft(e, instance);
                    break;
            }
        },