code: def atlas_peer_enqueue( peer_hostport, peer_table=None, peer_queue=None, max_neighbors=None ):
      
  
      present = False
  
      with AtlasPeerTableLocked(peer_table) as ptbl:
          present = (peer_hostport in ptbl.keys())
  
      if present:
          # nothing to do 
          return False
  
      res = False
      with AtlasPeerQueueLocked(peer_queue) as pq:
  
          if not present:
              if max_neighbors is None:
                  max_neighbors = atlas_max_neighbors()
  
              if len(pq) < atlas_max_new_peers(max_neighbors):
                  pq.append( peer_hostport )
                  res = True
  
      return res
docs: Begin talking to a new peer, if we aren't already.
      Don't accept this peer if there are already too many peers in the incoming queue
      (where "too many" means "more than the maximum neighbor set size")
  
      Return True if added
      Return False if not added