Mutation definition with parameter destructuring in chapter 5

[clockwiser]

In chapter 5, there is a mutation definition like below.

mutations: {
addToHistory(state: { history: HistoryEntry[] }, entry: HistoryEntry) {
state.history.push(entry)
},

What is this "state: { history: HistoryEntry[] } "?
Searched around but couldn't find any reliable explanation.

There is parameter destructuring explained here.
https://www.typescriptlang.org/docs/handbook/2/functions.html#parameter-destructuring
But it is not the same beast.