use Partial in nested property with typescript

Question

Say I have a type like this;

interface State {
  one: string,
  two: {
    three: {
      four: string
    },
    five: string
  }
}

I make

Answer 1

Try to exclude the nested Property, and add it again as Partial:

interface Foo {
    someName: Partial & { lvl2Partial: Partial }>
}