export declare type StringOrSymbol = string | symbol;
export declare type StringToString = {
    [key: string]: string;
};
export declare type StringToAny = {
    [key: string]: any;
};
export declare type Maybe<T> = T | undefined;
export declare function isDefined<T>(x: Maybe<T>): x is T;
export declare function getOrElse<T>(x: Maybe<T>, defaultValue: T): T;
export declare type Constructor<T> = new (...args: any[]) => T;
export declare type ClassPrototype = {
    constructor: Function;
};
export declare type ComponentClassDecorator<T> = (target: Constructor<T>) => void;
export declare type ClassOrMethodDecorator<T> = (target: ClassPrototype | Constructor<any>, propertyKey?: string, descriptor?: TypedPropertyDescriptor<T>) => void;