code: def build_thumb_path(self, image):
          
          image_file = image.file
          image_name_w_ext = split(image.name)[-1]
          image_name, ext = splitext(image_name_w_ext)
          if not self.in_memory(image_file):
              # `image_file` is already in disk (not in memory).
              # `image_name` is the full path, not just the name
              image_name = image_name.split('/')[-1]
          upload_to = image.field.upload_to
          if not upload_to.endswith('/'):
              upload_to = f'{upload_to}/'
          path_upload_to = f'{upload_to}{image_name}'
          return f'{self.storage.location}/{path_upload_to}{THUMB_EXT}{ext}'
docs: Build the absolute path of the to-be-saved thumbnail.