code: public List<GridFSDBFile> find(final String filename, final DBObject sort) {
          return find(new BasicDBObject("filename", filename), sort);
      }
docs: Finds a list of files matching the given filename.
  
  @param filename the filename to look for
  @param sort     the fields to sort with
  @return list of gridfs files
  @throws com.mongodb.MongoException if the operation fails