code: def _read(self):
          
          if self._dask:
              d = da.from_delayed(
                  delayed(read_from_bpch, )(
                      self.filename, self.file_position, self.shape,
                      self.dtype, self.endian, use_mmap=self._mmap
                  ),
                  self.shape, self.dtype
              )
          else:
              d = read_from_bpch(
                      self.filename, self.file_position, self.shape,
                      self.dtype, self.endian, use_mmap=self._mmap
              )
  
          return d
docs: Helper function to load the data referenced by this bundle.