/**
 * Check if a constructor is mixed from a specific constructor.
 * @param {function} ctor - The constructor to check.
 * @param {string} superStr - The name of constructor to check if the `ctor` is mixed from.
 * @returns {boolean} - True if `ctor` is mixed from `superCtor`, otherwise false.
 */
export function isMixinedFromStr(ctor: Function, superStr: string): boolean;
export default isMixinedFromStr;