export type ValueType = null | undefined | Function | symbol | bigint | number | boolean | string; export type ObjectType = Record; export type TypedArrayType = Int8Array | Uint8Array | Uint8ClampedArray | Int16Array | Uint16Array | Int32Array | Uint32Array | Float32Array | Float64Array | BigInt64Array | BigUint64Array; export type ArrayType = unknown[]; export declare namespace Is { function Object(value: unknown): value is ObjectType; function Date(value: unknown): value is Date; function Array(value: unknown): value is ArrayType; function Value(value: unknown): value is ValueType; function TypedArray(value: unknown): value is TypedArrayType; }