text: 
  export const RECEIVE_DECKS = 'RECEIVE_DECKS';
  export const ADD_DECK = 'ADD_DECK';
  export const ADD_CARD = 'ADD_CARD';
  
  export const receiveDecks = decks => ({
    type: RECEIVE_DECKS,
    decks
  });
  
  export const addDeck = title => ({
    type: ADD_DECK,
    title
  });
  
  export const addCard = (title, card) => ({
    type: ADD_CARD,
    title,
    card
  });