public static <A> Writer<io.jenetics.PermutationChromosome<A>> writer() {
			return writer(text());
		}
Create a writer for permutation-chromosomes. The valid alleles are
serialized by calling the {@link Object#toString()} method. Calling
this method is equivalent with:
{@snippet lang="java":
final Writer<PermutationChromosome<Double>> writer =
    PermutationChromosome.write(text().map(Objects::toString));
}

Example output:
<pre> {@code
<permutation-chromosome length="15">
    <valid-alleles type="java.lang.Double">
        <allele>0.27251556008507416</allele>
        <allele>0.003140816229067145</allele>
        <allele>0.43947528327497376</allele>
        <allele>0.10654807463069327</allele>
        <allele>0.19696530915810317</allele>
        <allele>0.7450003838065538</allele>
        <allele>0.5594416969271359</allele>
        <allele>0.02823782430152355</allele>
        <allele>0.5741102315010789</allele>
        <allele>0.4533651041367144</allele>
        <allele>0.811148141800367</allele>
        <allele>0.5710456351848858</allele>
        <allele>0.30166768355230955</allele>
        <allele>0.5455492865240272</allele>
        <allele>0.21068427527733102</allele>
    </valid-alleles>
    <order>13 12 4 6 8 14 7 2 11 5 3 0 9 10 1</order>
</permutation-chromosome>
} </pre>

@param <A> the allele type
@return a new permutation chromosome writer
jenetics.xml/src/main/java/io/jenetics/xml/Writers.java