code: def patch_for(self, path):
          
  
          if path not in self._patches:
              self._patches[path] = Patch(path)
  
          return self._patches[path]
docs: Returns the ``Patch`` for the target path, creating it if necessary.
  
          :param str path: The absolute module path to the target.
          :return: The mapped ``Patch``.
          :rtype: Patch