How do I Moq a method that has an optional argument in its signature without explicitly specifying it or using an overload?

Question

Given the following interface:

public interface IFoo
{
    bool Foo(string a, bool b = false);
}

Attempting to mock it using Moq:

Answer 1

Using Moq version 4.10.1 I have been able to do the following

With Interface:

public interface IFoo
{
    bool Foo(string a, bool b = false);
}

And Mock

var mock = new Mock();
mock.Setup(mock => mock.Foo(It.IsAny(), It.IsAny())).Returns(false);

Resolves a call to Foo with the first parameter okay