code: @SuppressWarnings("unchecked")
  	public static <T1, T2, T3> Function<Object[], Tuple3<T1, T2, T3>> fn3() {
  		return empty;
  	}
docs: A converting function from Object array to {@link Tuple3}
  
  @param <T1> The type of the first value.
  @param <T2> The type of the second value.
  @param <T3> The type of the third value.
  
  @return The unchecked conversion function to {@link Tuple3}.