Immutable can bring a lot of benefits, but if you use deconstruction or object.assign, it's actually not good for developers to maintain the code, or to directly introduce the drawbacks of the Immutable.js-band conversion consumption.
Although iFlow internal implementation of a complete immutable, but also conducive to iFlow's getState internal APIs combined with addObserver middleware to achieve customized immutable, iFlow provide getImmutable API.