import { CustomMesages } from '../types';
/**
 * Get the validation message for an attribute and rule.
 */
export declare function getMessage(attributes: string[], rule: string, value: any, customMessages: CustomMesages, hasNumericRule: boolean, lang: string): string;
/**
 * Convert a string to snake case.
 */
export declare function toSnakeCase(string: string): string;
/**
 * Get the formatted name of the attribute
 */
export declare function getFormattedAttribute(attribute: string): string;
/**
 * Get the combinations of keys from a main key. For example if the main key is 'user.info.name',
 * the combination will be [user.info.name, info.name, name]
 */
export declare function getKeyCombinations(key: string): string[];