Hi,

I'm attempting to upgrade to 4.0.0 and ran into this issue. I use getIn() to get to nested values simply without having to do a bunch of chained get() calls. In v4 I notice if an object within the keyPath is null it'll complain

v3

> I.Record({foo: null})().getIn(['foo', 'bar'], 'test')
'test'

v4

> I.Record({foo: null})().getIn(['foo', 'bar'], 'test')
Invalid keyPath: Value at ["foo"] does not have a .get() method: null
This warning will throw in a future version
'test'

Is this expected or is this actually an ok use of getIn() (I hope so)

Thanks!