code: func (p *simpleResourcePool) EnterLameDuckMode() {
  	p.mutex.Lock()
  
  	toClose := p.idleHandles
  	p.isLameDuck = true
  	p.idleHandles = []*idleHandle{}
  
  	p.mutex.Unlock()
  
  	p.closeHandles(toClose)
  }
docs: // See ResourcePool for documentation.