code: private String formatPrefix() {
  //        if use_gene and self.geneId:
          StringBuilder stringBuilder = new StringBuilder(transcriptId);
          stringBuilder.append("(").append(geneId).append(")");
  
          return stringBuilder.toString();
  //        return self.transcriptId
      }
docs: Generate HGVS trancript/geneId prefix.
  Some examples of full hgvs names with transcriptId include:
  NM_007294.3:c.2207A>C
  NM_007294.3(BRCA1):c.2207A>C