/**
 * @typedef {object} DefaultHeaderSettings
 * @property {string} label The name/label of the column header.
 * @property {number} colspan Current calculated colspan value of the rendered column header element.
 * @property {number} origColspan Original colspan value, set once while parsing user-defined nested header settings.
 * @property {number} rowspan Current calculated rowspan value of the rendered column header element.
 * @property {number} origRowspan Original rowspan value, set once while parsing user-defined nested header settings.
 * @property {boolean} collapsible The flag determines whether the node is collapsible (can be collapsed/expanded).
 * @property {number[]} crossHiddenColumns The list of visual column indexes which indicates that the specified columns within
 *                                         the header settings are hidden.
 * @property {boolean} isCollapsed The flag determines whether the node is collapsed.
 * @property {boolean} isHidden The flag determines whether the column header at specified index is hidden. If true
 *                              the TH element will be rendered as hidden (display: none).
 * @property {boolean} isRoot The flag which determines whether the column header settings is actually not renderable. That kind
 *                            of objects are generated after colspaned header to fill an array to correct size.
 *                            For example for header with colspan = 8 the 7 blank objects are generated to fill the array settings
 *                            to length = 8.
 * @property {boolean} isPlaceholder The flag determines whether the column header at the specified index is non-renderable.
 * @property {boolean} isRowspanPlaceholder The flag determines whether the column header is covered by a rowspan from a header
 *                                          in a row above and should not be rendered.
 * @property {string[]} headerClassNames The list of CSS classes that will be added to the `div` element inside the
 * header Acts as a replacement for the analogous property from the Handsontable settings.
 */
/**
 * Explicitly sets in which collapse state a header (and its columns) stays visible:
 * - `'collapsed'` - visible only while the parent group is collapsed (hidden while expanded);
 * - `'expanded'` - visible only while the parent group is expanded (hidden while collapsed);
 * - `'always'` - visible in both states.
 *
 * When left unset (within a group that uses any of these markers), the header defaults to
 * `'expanded'` - it is hidden when the group collapses, matching the default collapse behavior.
 */
export type HeaderVisibility = 'collapsed' | 'expanded' | 'always';
/**
 * Creates the header settings object with default values.
 *
 * @param {DefaultHeaderSettings} initialValues The initial values for the header settings object.
 * @returns {DefaultHeaderSettings}
 */
export declare function createDefaultHeaderSettings({ label, colspan, origColspan, rowspan, origRowspan, collapsible, crossHiddenColumns, isCollapsed, isHidden, isRoot, isPlaceholder, isRowspanPlaceholder, headerClassNames, visibleWhen }?: {
    label?: string;
    colspan?: number;
    origColspan?: number;
    rowspan?: number;
    origRowspan?: number;
    collapsible?: boolean;
    crossHiddenColumns?: number[];
    isCollapsed?: boolean;
    isHidden?: boolean;
    isRoot?: boolean;
    isPlaceholder?: boolean;
    isRowspanPlaceholder?: boolean;
    headerClassNames?: string[];
    visibleWhen?: HeaderVisibility;
}): {
    label: string;
    colspan: number;
    origColspan: number;
    rowspan: number;
    origRowspan: number;
    collapsible: boolean;
    isCollapsed: boolean;
    crossHiddenColumns: number[];
    isHidden: boolean;
    isRoot: boolean;
    isPlaceholder: boolean;
    isRowspanPlaceholder: boolean;
    headerClassNames: string[];
    visibleWhen: HeaderVisibility | undefined;
};
/**
 * Creates the placeholder header settings object. Those settings tell the header renderers
 * that this TH element should not be rendered (the node will be overlapped by the previously
 * created node with colspan bigger than 1).
 *
 * @returns {object}
 */
export declare function createPlaceholderHeaderSettings(): {
    label: string;
    isPlaceholder: boolean;
};