class Callable {
  call(x) {}
}

class CallableGetter {
  get call => new Callable();
}

main() {}

var closure = (x) => x;

var int1 = closure(1);

var int2 = closure.call(1);

var int3 = closure.call.call(1);

var int4 = closure.call.call.call(1);

var callable = new Callable();

var string1 = callable(1);

var string2 = callable.call(1);

var string3 = callable.call.call(1);

var string4 = callable.call.call.call(1);

var callableGetter = new CallableGetter();

var string5 = callableGetter(1);

var string6 = callableGetter.call(1);

var string7 = callableGetter.call.call(1);

var string8 = callableGetter.call.call.call(1);

var nothing1 = closure();

var nothing2 = closure.call();

var nothing3 = closure.call.call();

var nothing4 = closure.call.call.call();

var nothing5 = callable();

var nothing6 = callable.call();

var nothing7 = callable.call.call();

var nothing8 = callable.call.call.call();

var nothing9 = callableGetter();

var nothing10 = callableGetter.call();

var nothing11 = callableGetter.call.call();

var nothing12 = callableGetter.call.call.call();