///
////interface I1 {
//// (a: T): T;
////}
////interface I2 extends I1 {
//// b: T;
////}
////var x: I2;
////var /**/y = x(undefined); // Typeof y should be Date[]
////y.length;
goTo.marker();
verify.quickInfoIs('(var) y: Date[]');
verify.numberOfErrorsInCurrentFile(0);