code: def absolute_path(self, path, start):
          
          if posixpath.isabs(path):
              path = posixpath.join(staticfiles_storage.location, path)
          else:
              path = posixpath.join(start, path)
          return posixpath.normpath(path)
docs: Return the absolute public path for an asset,
          given the path of the stylesheet that contains it.