export function mergeProps<A, B>(a: A, b: B): B & A;
export function mergeProps<A, B, C>(a: A, b: B, c: C): C & B & A;
// merge defaultProps && props
export function mergeProps(...items: any[]) {
  const result = { ...items[0] };
  items.forEach((item) => {
    for (const key in item) {
      const val = item[key];
      // eslint-disable-next-line no-prototype-builtins
      result[key] = result.hasOwnProperty(key) ? result[key] : val;
    }
  });
  return result;
}