3.0 - Fix EagerLoader docblocks

[bcrowe]

No description provided.

[dereuromark]

It could probably also just return an empty array instead of void - to always return type array. If that makes sense.

[bcrowe]

Yup, doesn't look like anything is dependent on the void return. Either works for me.

Edit: technically a return w/o a value is a null return. But same things applies.

[dereuromark]

I'd usually go for the more consistent return type(s). But let's see what the others say.

[markstory]

I'm pretty sure the thing|void pattern is pretty consistent where we use combined getter/setter methods.