public Builder<G, C> maximalPhenotypeAge(final long age) {
			if (age < 1) {
				throw new IllegalArgumentException(format(
					"Phenotype age must be greater than one, but was %s.", age
				));
			}
			_maximalPhenotypeAge = age;
			return this;
		}
The maximal allowed age of a phenotype. <i>Default values is set to
{@code 70}.</i>

@param age the maximal phenotype age
@return {@code this} builder, for command chaining
@throws IllegalArgumentException if {@code age < 1}
jenetics/src/main/java/io/jenetics/engine/EvolutionParams.java