code: def _is_cidr_in_ignore_routes(cidr):
      
      for ignore_cidr in CURRENT_STATE.ignore_routes:
          if is_cidr_in_cidr(cidr, ignore_cidr):
              return True
      return False
docs: Checks the CIDR to see if it falls into any CIDRs specified via the
      ignore_routes parameter.
  
      This is used mostly to protect special routes to specific instances (for
      example proxies, etc.), so that the vpc-router does not clean those up.
  
      Only used to govern cleanup of routes, is not consulted when creating
      routes.