manual

type Resolver struct {
	ResolveOneAddrCallback func(ctx context.Context, addrs []resolver.Address, opts ...resolver.ResolveOneAddrOption) (resolver.Address, error)
	ResolveAddrCallback    func(ctx context.Context, addrs []resolver.Address, opts ...resolver.ResolveAddrOption) ([]resolver.Address, error)
	// ResolveNowCallback is called when the ResolveNow method is called on the
	// resolver.  Must not be nil.  Must not be changed after the resolver may
	// be built.
	ResolveNowCallback func(ctx context.Context, opts ...resolver.ResolveNowOption)

	// Addresses is the latest set of resolved addresses for the target.
	Addresses []resolver.Address

	// Fields actually belong to the resolver.
	CC resolver.ClientConn
	// contains filtered or unexported fields
}