changes as per review

options.go

@@ -18,8 +18,8 @@ type options struct {
 	}
 }
 
-// Apply applies the given options to this option.
-func (o *options) Apply(opts ...Option) error {
+// apply applies the given options to this option.
+func (o *options) apply(opts ...Option) error {
 	for i, opt := range opts {
 		if err := opt(o); err != nil {
 			return fmt.Errorf("routing table option %d failed: %s", i, err)

table.go

@@ -90,7 +90,7 @@ func NewRoutingTable(bucketsize int, localID ID, latency time.Duration, m peerst
 	opts ...Option) (*RoutingTable, error) {
 
 	var cfg options
-	if err := cfg.Apply(append([]Option{Defaults}, opts...)...); err != nil {
+	if err := cfg.apply(append([]Option{Defaults}, opts...)...); err != nil {
 		return nil, err
 	}
 

table_test.go

@@ -18,6 +18,15 @@ var PeerAlwaysValidFnc = func(ctx context.Context, p peer.ID) bool {
 	return true
 }
 
+func TestPrint(t *testing.T) {
+	t.Parallel()
+	local := test.RandPeerIDFatal(t)
+	m := pstore.NewMetrics()
+	rt, err := NewRoutingTable(1, ConvertPeerID(local), time.Hour, m, PeerValidationFnc(PeerAlwaysValidFnc))
+	require.NoError(t, err)
+	rt.Print()
+}
+
 // Test basic features of the bucket struct
 func TestBucket(t *testing.T) {
 	t.Parallel()