/**
 * Checks if string matches the pattern.
 * Either matches('foo', /foo/i) or matches('foo', 'foo', 'i').
 * If given value is not a string, then it returns false.
 *
 * @param value The value being checked.
 * @param pattern The match pattern
 * @param modifiers The modifiers
 * @returns True if string matches the pattern, false otherwise.
 */
export declare function isMatch(value: string, pattern: RegExp, modifiers?: string): boolean;