export declare type Primitive = null | undefined | string | number | boolean | symbol | bigint;
export declare const isNull: (value: unknown) => value is null;
export declare const isUndefined: (value: unknown) => value is undefined;
export declare const isNullOrUndefined: (value: unknown) => value is null | undefined;
export declare const isAssigned: <T>(value: T | null | undefined) => value is T;
export declare const isString: (value: unknown) => value is string;
export declare const isNumber: (value: unknown) => value is number;
export declare const isBoolean: (value: unknown) => value is boolean;
export declare const isSymbol: (value: unknown) => value is symbol;
export declare const isBigInt: (value: unknown) => value is bigint;
export declare const isPrimitives: (value: unknown) => value is Primitive;
export declare const isFunction: (value: unknown) => value is Function;
export declare const isObject: (value: unknown) => value is Record<any, any>;
export declare const objectToString: () => string;
export declare const toTypeString: (value: unknown) => string;
export declare const hasOwn: (value: object, key: string | symbol) => key is never;
export declare const toRawType: (value: unknown) => string;
export declare const isPlainObject: (value: unknown) => value is object;
export declare const isArray: <V = any>(value: unknown) => value is V[];
export declare const isMap: <K = any, V = any>(value: unknown) => value is Map<K, V>;
export declare const isSet: <V = any>(value: unknown) => value is Set<V>;
export declare const isPromise: <T = any>(value: unknown) => value is Promise<T>;
export declare const isDate: (value: unknown) => value is Date;