why use copy instead of loop

[Jerry-yz]

why not use copy(result, c.webServices)
loop
func (c *Container) RegisteredWebServices() []*WebService {
c.webServicesLock.RLock()
defer c.webServicesLock.RUnlock()
result := make([]*WebService, len(c.webServices))
for ix := range c.webServices {
result[ix] = c.webServices[ix]
}
return result
}

[emicklei]

there was no particular reason for not using copy.