code: public Object get(String key) throws BaseException {
  		Object o = opt(key);
  		if (o == null) {
  			throw new BaseException(key + " not found.");
  		}
  		return o;
  	}
docs: Get the value object associated with a key.
  
  @param key
  A key string.
  @return The object associated with the key.
  @throws BaseException
  if the key is not found.