code: func (c *logCache) LogURIs() []string {
  	c.RLock()
  	defer c.RUnlock()
  	var uris []string
  	for _, l := range c.logs {
  		uris = append(uris, l.uri)
  	}
  	return uris
  }
docs: // LogURIs returns the URIs of all logs currently in the logCache