code: func (c *ConnectionStore) Disconnect(expectedServerCert []byte) {
  	c.lock.Lock()
  	defer c.lock.Unlock()
  
  	conn, connected := c.Connections.Lookup(expectedServerCert)
  	if !connected {
  		return
  	}
  	conn.Close()
  	c.Connections.Remove(expectedServerCert)
  }
docs: // Disconnect closes the gRPC connection that is mapped to the given certificate