code: public final static List<PolymerNotation> getBLOBPolymers(List<PolymerNotation> polymers) {
      List<PolymerNotation> blobPolymers = new ArrayList<PolymerNotation>();
      for (PolymerNotation polymer : polymers) {
        if (polymer.getPolymerID() instanceof BlobEntity) {
          blobPolymers.add(polymer);
        }
      }
      return blobPolymers;
    }
docs: method to get all blob polymers given a list of PolymerNotation objects
  
  @param polymers List of PolymerNotation objects
  @return list of blob polymers