output.js

type Point = {
  x: number;
  y: number;
};

function value(_ref: Point) {
  var x = _ref.x,
      y = _ref.y;
  return x * y;
}

function valueWithDefault() {
  var _ref2 = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {},
      x = _ref2.x,
      y = _ref2.y;

  return x * y;
}