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

function createCommand(winKey: number, macKey: number, action: (editor: Editor) => any) {
    return {
        winKey,
        macKey,
        action,
    };
}

const commands: ShortcutCommand[] = [
    createCommand(Keys.Ctrl | Keys.B, Keys.Meta | Keys.B, toggleBold),
    createCommand(Keys.Ctrl | Keys.I, Keys.Meta | Keys.I, toggleItalic),
    createCommand(Keys.Ctrl | Keys.U, Keys.Meta | Keys.U, toggleUnderline),
    createCommand(Keys.Ctrl | Keys.Z, Keys.Meta | Keys.Z, editor => editor.undo()),
    createCommand(Keys.Ctrl | Keys.Y, Keys.Meta | Keys.Shift | Keys.Z, editor => editor.redo()),
    createCommand(Keys.Ctrl | Keys.PERIOD, Keys.Meta | Keys.PERIOD, toggleBullet),
    createCommand(Keys.Ctrl | Keys.FORWARDSLASH, Keys.Meta | Keys.FORWARDSLASH, toggleNumbering),
    createCommand(
        Keys.Ctrl | Keys.Shift | Keys.PERIOD,
        Keys.Meta | Keys.Shift | Keys.PERIOD,
        editor => changeFontSize(editor, FontSizeChange.Increase)
    ),
    createCommand(
        Keys.Ctrl | Keys.Shift | Keys.COMMA,
        Keys.Meta | Keys.Shift | Keys.COMMA,
        editor => changeFontSize(editor, FontSizeChange.Decrease)
    ),
];

/**
 * DefaultShortcut edit feature, provides shortcuts for the following features:
 * Ctrl/Meta+B: toggle bold style