import { Workbook } from '../core/model.js';
export type ConflictStrategy = 'left-wins' | 'right-wins' | 'error';
/** Split a sheet by row index, column index, or into N equal row chunks. */
export declare function splitByRows(workbook: Workbook, sheetName: string, at: number): [Workbook, Workbook];
export declare function splitByColumns(workbook: Workbook, sheetName: string, at: number): [Workbook, Workbook];
export declare function splitBySheet(workbook: Workbook): Workbook[];
/**
 * Merge multiple workbooks into one. Sheets with the same name are combined
 * row-wise; on cell conflicts (shouldn't normally happen with row-wise append,
 * but relevant for future cell-level merges) the strategy decides the winner.
 */
export declare function merge(workbooks: Workbook[], opts?: {
    onConflict?: ConflictStrategy;
}): Workbook;