import { default as React } from 'react';
import { TableColumnNode } from '../report-definition-types';
export interface HeaderCell {
    id: string;
    label: string;
    colSpan: number;
    rowSpan: number;
    align?: 'left' | 'center' | 'right';
    isLeaf: boolean;
    leafId?: string;
}
export declare function buildHeaderMatrix(tree: TableColumnNode[]): HeaderCell[][];
interface Props {
    tree: TableColumnNode[];
    headerBg: string;
    headerColor: string;
    cellBorder: string;
    renderLeafHeader: (columnId: string, label: string, align?: 'left' | 'center' | 'right') => React.ReactNode;
}
export declare const NestedTableHeader: React.FC<Props>;
export {};