/**
 * Checks whether a string contains only one or more asterisk characters.
 *
 * @param value The string to inspect.
 * @returns True when the string contains at least one character and every character is `*`.
 */
export declare function isAllAsterisks(value: string): boolean;
/**
 * The service and action name portions of an IAM action string.
 */
export interface IamActionParts {
    /**
     * The service prefix before the separator colon.
     */
    service: string;
    /**
     * The action name or wildcard pattern after the separator colon.
     */
    actionName: string;
}
/**
 * Tests whether a candidate string matches an IAM wildcard pattern without allocating
 * intermediate strings or regular expressions.
 *
 * @param pattern The IAM wildcard pattern to test, where `*` matches zero or more characters and `?` matches one character.
 * @param candidate The candidate string to check against the pattern.
 * @returns True if the candidate matches the whole pattern, otherwise false.
 */
export declare function wildcardMatches(pattern: string, candidate: string): boolean;
/**
 * Parses an IAM action string into service and action portions without splitting the string.
 *
 * @param actionString The IAM action string to parse.
 * @returns Parsed action parts, or undefined when the string does not contain exactly one colon.
 */
export declare function parseIamActionParts(actionString: string): IamActionParts | undefined;
/**
 * Unescapes unicode characters in a string
 *
 * @param str The string to unescape
 * @returns The string with any escaped unicode characters replaced with their actual characters
 */
export declare function unescapeUnicodeCharacters(str: string): string;
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