code: func (c *ServerContext) SendSubsystemResult(r SubsystemResult) {
  	select {
  	case c.SubsystemResultCh <- r:
  	default:
  		c.Infof("blocked on sending subsystem result")
  	}
  }
docs: // SendSubsystemResult sends the result of running the subsystem over the
  // SubsystemResultCh.