code: func (net *Network) GetConn(oneID, otherID enode.ID) *Conn {
  	net.lock.RLock()
  	defer net.lock.RUnlock()
  	return net.getConn(oneID, otherID)
  }
docs: // GetConn returns the connection which exists between "one" and "other"
  // regardless of which node initiated the connection