export default function reducer(state:IPlayersStatState = initialState, action:IAction): IPlayersStatState {
  switch (action.type) {
    case SET: {
      const { id, speed } = action.payload;
      return update(state, {
        [id]: (cur:IPlayerStatState) => update(cur || initialPlayerState, {$set: {speed}})
      });
    }
    default: return state;
  }
};