getIn()

getIn<C, P>(object: C, keyPath: [never]): RetrievePath<C, P>
getIn<C, P>(object: C, keyPath: P): unknown
getIn<C, P, NSV>(collection: C, keyPath: [never], notSetValue: NSV): never
getIn<C, P, NSV>(object: C, keyPath: P, notSetValue: NSV): unknown

This documentation is generated from immutable.d.ts. Pull requests and Issues welcome.

Immutable.js

getIn()