code: def copy(self, dest, src):
          
          doc = fragment = deepcopy(self.document)
          for token in Pointer(src):
              fragment = token.extract(fragment, bypass_ref=True)
  
          return Target(doc).add(dest, fragment)
docs: Copy element from sequence, member from mapping.
  
          :param dest: the destination
          :type dest: Pointer
          :param src: the source
          :type src: Pointer
          :return: resolved document
          :rtype: Target