package sandbox import "net" func (i *nwIface) processInterfaceOptions(options ...IfaceOption) { for _, opt := range options { if opt != nil { opt(i) } } } func (n *networkNamespace) Address(addr *net.IPNet) IfaceOption { return func(i *nwIface) { i.address = addr } } func (n *networkNamespace) AddressIPv6(addr *net.IPNet) IfaceOption { return func(i *nwIface) { i.addressIPv6 = addr } } func (n *networkNamespace) Routes(routes []*net.IPNet) IfaceOption { return func(i *nwIface) { i.routes = routes } }