import { BaseValidator } from './baseValidator';
import { ValidationResult } from './validationTypes';
import { FileAdapter } from '../utils/io';
/**
 * Validator for Excel imports (.xlsx/.xls)
 */
export declare class ExcelValidator extends BaseValidator {
    static validateFile(filePath: string, fileAdapter?: FileAdapter): Promise<ValidationResult>;
    static identifyFormat(_content: any, filename: string): Promise<boolean>;
    validate(content: Buffer | Uint8Array, filename: string, filesize: number): Promise<ValidationResult>;
}