Function updateLastMessage

components/MessageInput/MessageInput.tsx:123–129

(newMessage)

  };

  const updateLastMessage = async (newMessage) => {
    DataStore.save(
      ChatRoom.copyOf(chatRoom, (updatedChatRoom) => {
        updatedChatRoom.LastMessage = newMessage;
      })
    );
  };

  const onPlusClicked = () => {
    console.warn("On plus clicked");