private DoubleAdder reset() {
		_sum = 0.0;
		_simpleSum = 0.0;
		_compensation = 0.0;
		return this;
	}
Reset the adder to the initial value of {@code 0.0}.

@return {@code this} adder, for command chaining
jenetics/src/main/java/io/jenetics/internal/math/DoubleAdder.java