//// [indexerReturningTypeParameter1.ts]
interface f {
    groupBy<T>(): { [key: string]: T[]; };
}
var a: f;
var r = a.groupBy();

class c {
    groupBy<T>(): { [key: string]: T[]; } {
        return null;
    }
}
var a2: c;
var r2 = a2.groupBy();

//// [indexerReturningTypeParameter1.js]
var a;
var r = a.groupBy();
var c = (function () {
    function c() {
    }
    c.prototype.groupBy = function () {
        return null;
    };
    return c;
})();
var a2;
var r2 = a2.groupBy();