import { MessageFunctionType, Result } from '../types';
export interface WhiteErrors {
    TARGET_ARGUMENT_NOT_A_STRING: MessageFunctionType;
}
export declare const WHITELIST_ERRORS: WhiteErrors;
/**
 * Remove characters that do not appear
 * in the whitelist. The characters are
 * used in a RegExp and so you will need
 * to escape some chars, e.g. `whitelist(input, '\\[\\]')`.
 *
 * @param target The target
 * @param chars The chars
 */
export declare function whitelist(target: string, chars: string): Result<string | undefined>;