@Override
	public String toString() {
		return _genes.toByteString();
	}
Returns a new {@code BitChromosome} whose value is ({@code this >> n}). The shift
distance, n, may be negative, in which case this method performs a left
shift.

@param n shift distance, in bits
@return {@code this >> n}
jenetics/src/main/java/io/jenetics/BitChromosome.java