Http documentation doesn't match code functionality

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In the document:
https://github.com/angular/angular.dart/blob/master/lib/core_dom/http.dart#L418
It states that passing true will use the default cache.

But in the code:
https://github.com/angular/angular.dart/blob/master/lib/core_dom/http.dart#L469
Behaviors are

1. passing false will disable the cache,
2. passing null or not passing cache parameter will use the default cache,
3. passing true result in NoSuchMethodError (since cache method is called on the bool value)