'new' keyword in dart

Question

How come in dart in a line of code such as this one:

MaterialPageRouter(builder: (context) => MyWidget())

We are returning MyWidget class with out instantiating it with the keyword new as in new MyWidget() ? Are we just returning the class itself and something happens under the hood that uses the new keyword to do whats required. Or something else is happening?

Answer 1

new became optional in Dart 2. You can just omit it or write it. It doesn't make a difference.

MyWidget() creates a new instances and this is what is returned.