code: public GlResourceBuilder allele(final String glstring) throws GlClientException {
          allele = client.createAllele(glstring);
          locus = allele.getLocus();
          return this;
      }
docs: Return this gl resource builder configured with the specified allele. Calls to this method must
  be interspersed by calls to operator methods ({@link #allelicAmbiguity()}, {@link #inPhase()},
  {@link #plus()}, {@link #genotypicAmbiguity()}, and {@link #locus(String)}).
  
  @param glstring allele in GL String format, must not be null
  @return this gl resource builder configured with the specified allele
  @throws GlClientException if an error occurs