/**
 * @name useSetState
 * @description - Hook that manages an object state, merging updates like `this.setState` in class components.
 *
 * @template T The type of the state object.
 * @param {T | (() => T)} initialState The initial state object or a function that returns it.
 * @returns {[T, (patch: Partial<T> | ((prevState: T) => Partial<T>)) => void]} A tuple containing the current state object and a function to merge updates into it.
 *
 * @example
 * const [state, setState] = useSetState({ count: 0, name: 'Default' });
 * // Update only count
 * setState({ count: 1 });
 * // Update name using a function
 * setState(prevState => ({ name: prevState.name.toUpperCase() }));
 */
export declare const useSetState: <T extends object>(initialState: T | (() => T)) => [T, (patch: Partial<T> | ((prevState: T) => Partial<T>)) => void];