I'm trying to mock a function like

```
def foo(x: A, y: B, z: C = blah)

```

where blah is a java connection object that I don't want to create on the spot

However when I try to stub it like

```
    (object.foo _)
  .stubs(a, b)

```

It errors out and says overloaded method value stubs with alternatives...
because it's looking for the third parameter. Is there anyway to get around this.