code: def _get_ensemble_bed_files(items):
      
      bed_files = []
      for data in items:
          for sv in data.get("sv", []):
              if sv["variantcaller"] == "sv-ensemble":
                  if ("vrn_file" in sv and not vcfutils.get_paired_phenotype(data) == "normal"
                        and file_exists(sv["vrn_file"])):
                      bed_files.append(sv["vrn_file"])
      return bed_files
docs: get all ensemble structural BED file calls, skipping any normal samples from
      tumor/normal calls