useStateAsync.d.ts
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	import React from 'react';
	export declare type AsyncSetState<TState> = (stateUpdate: React.SetStateAction<TState>) => Promise<TState>;
	/**
	* A hook that mirrors `useState` in function and API, expect that setState
	* calls return a promise that resolves after the state has been set (in an effect).
	*
	* This is _similar_ to the second callback in classy setState calls, but fires later.
	*
	* ```ts
	* const [counter, setState] = useStateAsync(1);
	*
	* const handleIncrement = async () => {
	* await setState(2);
	* doWorkRequiringCurrentState()
	* }
	* ```
	*
	* @param initialState initialize with some state value same as `useState`
	*/
	export default function useStateAsync<TState>(initialState: TState \| (() => TState)): [TState, AsyncSetState<TState>];