code: def _load(self, files_in, files_out, urlpath, meta=True):
          
          import dask
          out = []
          outnames = []
          for file_in, file_out in zip(files_in, files_out):
              cache_path = file_out.path
              outnames.append(cache_path)
  
              # If `_munge_path` did not find a match we want to avoid
              # writing to the urlpath.
              if cache_path == urlpath:
                  continue
  
              if not os.path.isfile(cache_path):
                  logger.debug("Caching file: {}".format(file_in.path))
                  logger.debug("Original path: {}".format(urlpath))
                  logger.debug("Cached at: {}".format(cache_path))
                  if meta:
                      self._log_metadata(urlpath, file_in.path, cache_path)
                  ddown = dask.delayed(_download)
                  out.append(ddown(file_in, file_out, self.blocksize,
                                   self.output))
          dask.compute(*out)
          return outnames
docs: Download a set of files