I agree that this might be seen as a nitpick but we should err on the side of code correctness, especially when this is a very easy change.  While we're on the subject of this builder it's important to point out that it is inherently flawed is that the builder maintains a reference to the returned InstanceInfo and can modify that object after it is returned.  The builder should actually return an immutable object.  Sure, this isn't an issue as long as the Builder is used correctly but can be the source of difficult to find bugs in the future.