code: public Properties get(String key) throws PropertyException {
  		ObjectChecks.checkForNullReference(key, "key is null");
  		Properties propertyCopy = new Properties(this, key);
  		return propertyCopy;
  	}
docs: Get a new Properties instance for the given property key. Only property
  keys accepted but not a path (Example: key is allowed, not foo.bar.key).
  
  @param key
  the property key, for which a new instance of Properties shall
  be instantiated
  @return a new {@link Properties} instance, containing all subpaths of the
  given key.
  @throws PropertyException
  if the given key is not a property key or is not part of a
  property path.