code: def _nl_cache_ops_lookup(name):
      
      ops = cache_ops
      while ops:  # Loop until `ops` is None.
          if ops.co_name == name:
              return ops
          ops = ops.co_next
      return None
docs: https://github.com/thom311/libnl/blob/libnl3_2_25/lib/cache_mngt.c#L41.
  
      Positional arguments:
      name -- string.
  
      Returns:
      nl_cache_ops instance or None.