code: func (c *lruSessionCache) Get(sessionKey string) (*ClientSessionState, bool) {
  	c.Lock()
  	defer c.Unlock()
  
  	if elem, ok := c.m[sessionKey]; ok {
  		c.q.MoveToFront(elem)
  		return elem.Value.(*lruSessionCacheEntry).state, true
  	}
  	return nil, false
  }
docs: // Get returns the ClientSessionState value associated with a given key. It
  // returns (nil, false) if no value is found.