import { MessageFunctionType, Result } from '../types';
export interface IsNotSubStringErrors {
    TARGET_ARGUMENT_NOT_A_STRING: MessageFunctionType;
    CONTAINED_ARGUMENT_NOT_A_STRING: MessageFunctionType;
}
export declare const IS_NOT_SUBSTRING_ERRORS: IsNotSubStringErrors;
/**
 * Checks if the value is not a substring of the target.
 * If given value is not a string, then it returns false.
 *
 * ### Example
 * ```
 * expect(isNotSubString("3", "2").value).toBeTruthy()
 * ```
 * @param contained The value that may be contained.
 * @param target The target value to perform the check against.
 */
export declare function isNotSubString(contained: string, target: string): Result<boolean | undefined>;