TypeScript/tests/baselines/reference/arrayConcatMap.types

=== tests/cases/compiler/arrayConcatMap.ts ===
var x = [].concat([{ a: 1 }], [{ a: 2 }])
>x : any[], Symbol(x, Decl(arrayConcatMap.ts, 0, 3))
>[].concat([{ a: 1 }], [{ a: 2 }])          .map(b => b.a) : any[]
>[].concat([{ a: 1 }], [{ a: 2 }])          .map : <U>(callbackfn: (value: any, index: number, array: any[]) => U, thisArg?: any) => U[], Symbol(Array.map, Decl(lib.d.ts, 1115, 92))
>[].concat([{ a: 1 }], [{ a: 2 }]) : any[]
>[].concat : { <U extends any[]>(...items: U[]): any[]; (...items: any[]): any[]; }, Symbol(Array.concat, Decl(lib.d.ts, 1025, 13), Decl(lib.d.ts, 1030, 46))
>[] : undefined[]
>concat : { <U extends any[]>(...items: U[]): any[]; (...items: any[]): any[]; }, Symbol(Array.concat, Decl(lib.d.ts, 1025, 13), Decl(lib.d.ts, 1030, 46))
>[{ a: 1 }] : { a: number; }[]
>{ a: 1 } : { a: number; }
>a : number, Symbol(a, Decl(arrayConcatMap.ts, 0, 20))
>1 : number
>[{ a: 2 }] : { a: number; }[]
>{ a: 2 } : { a: number; }
>a : number, Symbol(a, Decl(arrayConcatMap.ts, 0, 32))
>2 : number

          .map(b => b.a);
>map : <U>(callbackfn: (value: any, index: number, array: any[]) => U, thisArg?: any) => U[], Symbol(Array.map, Decl(lib.d.ts, 1115, 92))
>b => b.a : (b: any) => any
>b : any, Symbol(b, Decl(arrayConcatMap.ts, 1, 15))
>b.a : any
>b : any, Symbol(b, Decl(arrayConcatMap.ts, 1, 15))
>a : any