public void unset(final int index) {
		Objects.checkIndex(index, length());
		Bits.unset(_data, _start + index);
	}
Set the bit in the given byte array at the bit position (not the index
within the byte array) to {@code false}.

@param index the bit index
@throws IndexOutOfBoundsException if the index is not within the valid
        range of {@code [0, length())}
jenetics/src/main/java/io/jenetics/internal/collection/BitArray.java