/** 分组表头及可见分组边界的统一样式。@author nokecy */
type DisplayedGroup = {
    getParent(): DisplayedGroup | null;
    isPadding(): boolean;
    getColGroupDef(): unknown;
    getDisplayedLeafColumns(): DisplayedColumn[];
};
type DisplayedColumn = {
    getParent(): DisplayedGroup | null;
};
export declare const compositeClasses: {
    readonly group: "app-grid-composite-group";
    readonly header: "app-grid-composite-header";
    readonly cell: "app-grid-composite-cell";
    readonly start: "app-grid-composite-start";
    readonly end: "app-grid-composite-end";
};
/** 使用显示分组而非原始列顺序，覆盖隐藏列、拆分分组、固定列及多层嵌套。@author nokecy */
export declare const getCompositeColumnEdges: (column?: DisplayedColumn | null) => {
    grouped: boolean;
    start: boolean;
    end: boolean;
};
/** 保留页面自定义表头类，所有真实分组共用居中标题和边框。@author nokecy */
export declare const withCompositeGroupHeader: <T extends Record<string, any>>(column: T) => T;
/** 原有类名和规则完整保留；分组边框规则随当前显示列重新求值并移除失效边框。@author nokecy */
export declare const withCompositeLeafHeader: <T extends Record<string, any>>(column: T) => T;
export {};