code: public Entity get(Transaction transaction, Key key) {
  		try {
  			return datastore.get(transaction, key);
  		} catch (EntityNotFoundException e) {
  			return null;
  		}
  	}
docs: Gets App Engine Datastore entity corresponding to the specified
  {@code Key} within the specified {@code Transaction}.
  
  @param transaction The transaction to get the entity.
  @param key The key to get the entity.
  @return The entity corresponding to the specified {@code Key}.