code: def _upload_resumable_unit(self, uu_info):
          
  
          # Get actual unit size
          unit_size = uu_info.fd.len
  
          if uu_info.hash_ is None:
              raise ValueError('UploadUnitInfo.hash_ is now required')
  
          return self._api.upload_resumable(
              uu_info.fd,
              uu_info.upload_info.size,
              uu_info.upload_info.hash_info.file,
              uu_info.hash_,
              uu_info.uid,
              unit_size,
              filedrop_key=uu_info.upload_info.filedrop_key,
              folder_key=uu_info.upload_info.folder_key,
              path=uu_info.upload_info.path,
              action_on_duplicate=uu_info.upload_info.action_on_duplicate)
docs: Upload a single unit and return raw upload/resumable result
  
          uu_info -- UploadUnitInfo instance