code: func (c *ACLCaches) PutIdentity(id string, ident ACLIdentity) {
  	if c == nil || c.identities == nil {
  		return
  	}
  
  	c.identities.Add(id, &IdentityCacheEntry{Identity: ident, CacheTime: time.Now()})
  }
docs: // PutIdentity adds a new identity to the cache