export declare const isString: (value: unknown) => value is string;
export declare const isNumber: (value: unknown) => value is number;
export declare const isBigint: (value: unknown) => value is bigint;
export declare const isBoolean: (value: unknown) => value is boolean;
export declare const isSymbol: (value: unknown) => value is symbol;
export declare const isUndefined: (value: unknown) => value is undefined;
export declare const isNull: (value: unknown) => value is null;
export declare const isFunction: (value: unknown) => value is Function;
export declare const isObject: (value: unknown) => value is Record<any, any>;