declare namespace let { } declare namespace SampleLet1 { } declare namespace SampleLet2 { } declare class SampleLet3 { private let; } declare class SampleLet4 { private var; let: any; } declare class SampleLet5 { let(): void; } interface SampleLet6 { let: any; } declare function methodLet(let: any): void; declare var let: any;