code: public void
  addAll(Mnemonic source) {
  	if (wordcase != source.wordcase)
  		throw new IllegalArgumentException(source.description +
  						   ": wordcases do not match");
  	strings.putAll(source.strings);
  	values.putAll(source.values);
  }
docs: Copies all mnemonics from one table into another.
  @param val The numeric value
  @param string The text string
  @throws IllegalArgumentException The wordcases of the Mnemonics do not
  match.