// Multiple indexers of the same type are an error class C { [x: string]: string; [x: string]: string; } interface I { [x: string]: string; [x: string]: string; } var a: { [x: string]: string; [x: string]: string; } var b: { [x: string]: string; [x: string]: string; } = { y: '' } class C2 { [x: string]: string; [x: string]: string; } interface I2 { [x: string]: string; [x: string]: string; }