code: public DoubleAdder add(final double[] values) {
  		for (int i = values.length; --i >= 0;) {
  			add(values[i]);
  		}
  
  		return this;
  	}
docs: Add the given values to this adder.
  
  @param values the values to add.
  @return {@code this} adder, for command chaining