/**
 * Check if a string starts with $ or _
 */
export declare function isReserved(str: string): boolean;
export declare function isSupportProxy(): boolean;
export declare function isSymbol(symbol: any): boolean;
export declare function isSupportSymbol(): boolean;
export declare const toObjectTypeString: (value: any) => string;
export declare const stateDecoRegExp: RegExp;