func (r *relayItems) Add(id uint32, item relayItem) {
	r.Lock()
	r.items[id] = item
	r.Unlock()
}
func (r *relayItems) Add(id uint32, item relayItem) {
	r.Lock()
	r.items[id] = item
	r.Unlock()
}
func ( r * relayItems ) Add ( id uint32 , item relayItem ) { r . Lock ( ) r . items [ id ] = item r . Unlock ( ) }
// Add adds a relay item.
Add adds a relay item .