public static CharacterChromosome of(final IntRange lengthRange) {
		return of(DEFAULT_CHARACTERS, lengthRange);
	}
Create a new chromosome with the {@link CharacterGene#DEFAULT_CHARACTERS}
char set as valid characters.

@param lengthRange the allowed length range of the chromosome.
@return a new {@code CharacterChromosome} with the given parameter
@throws IllegalArgumentException if the {@code length} is smaller than
        one.
jenetics/src/main/java/io/jenetics/CharacterChromosome.java