code: @SuppressWarnings("unchecked")
  	@Override
  	public List<String> getStringList(String key) {
  		return getData(key, List.class);
  	}
docs: Returns list (null safe) of elements for desired key from dataSource files
  
  @param key desired node key
  @return list of elements for desired key
  @throws IllegalArgumentException if no element for key has been found