How to use the roosterjs-editor-core.Keys.UP function in roosterjs-editor-core

handleEvent: (event, editor) => {
        let td = cacheGetTableCell(event, editor);
        let vtable = new VTable(td);
        let isUp = event.rawEvent.which == Keys.UP;
        let step = isUp ? -1 : 1;
        let targetTd: HTMLTableCellElement = null;
        let hasShiftKey = event.rawEvent.shiftKey;
        let { anchorNode, anchorOffset } = editor.getSelection();

        for (let row = vtable.row; row >= 0 && row < vtable.cells.length; row += step) {
            let cell = vtable.getCell(row, vtable.col);
            if (cell.td && cell.td != td) {
                targetTd = cell.td;
                break;
            }
        }

        editor.runAsync(() => {
            let newContainer = editor.getElementAtCursor();
            if (

let cell = vtable.getCell(row, col);
            if (cell.td) {
                editor.select(cell.td, PositionType.Begin);
                break;
            }
        }
        event.rawEvent.preventDefault();
    },
};

/**
 * UpDownInTable edit feature, provides the ability to jump to cell above/below when user press UP/DOWN
 * in table
 */
export const UpDownInTable: ContentEditFeature = {
    keys: [Keys.UP, Keys.DOWN],
    shouldHandleEvent: cacheGetTableCell,
    handleEvent: (event, editor) => {
        let td = cacheGetTableCell(event, editor);
        let vtable = new VTable(td);
        let isUp = event.rawEvent.which == Keys.UP;
        let step = isUp ? -1 : 1;
        let targetTd: HTMLTableCellElement = null;
        let hasShiftKey = event.rawEvent.shiftKey;
        let { anchorNode, anchorOffset } = editor.getSelection();

        for (let row = vtable.row; row >= 0 && row < vtable.cells.length; row += step) {
            let cell = vtable.getCell(row, vtable.col);
            if (cell.td && cell.td != td) {
                targetTd = cell.td;
                break;
            }