diff --git a/.github/workflows/go-test.yml b/.github/workflows/go-test.yml
index 180b99d..f53ab11 100644
--- a/.github/workflows/go-test.yml
+++ b/.github/workflows/go-test.yml
@@ -40,7 +40,7 @@ jobs:
       - name: Lint
         uses: golangci/golangci-lint-action@v3
         with:
-          version: v1.47.2
+          version: v1.58.0
       - name: Check diffs
         # --name-only first for debugging
         run: git diff --name-only && git diff --quiet
diff --git a/checkers/unused/check.go b/checkers/unused/check.go
index 055184a..6777e0a 100644
--- a/checkers/unused/check.go
+++ b/checkers/unused/check.go
@@ -16,8 +16,8 @@ func (e Error) Error() string {
 }
 
 // Check checks that all nodes are used in one way or another:
-// 	- have only one error output
-//	- are used explicitly
+//   - have only one error output
+//   - are used explicitly
 func Check(graph goflow.GraphRenderer) error {
 	nodes := graph.Nodes()
 
diff --git a/example/generator/main.go b/example/generator/main.go
index d4b4f97..7350ab6 100644
--- a/example/generator/main.go
+++ b/example/generator/main.go
@@ -5,7 +5,6 @@ import (
 	"encoding/json"
 	"errors"
 	"fmt"
-	"io/ioutil"
 	"os"
 	"path"
 	"sort"
@@ -111,7 +110,7 @@ func main() {
 			continue
 		}
 
-		if err := ioutil.WriteFile(generatedFilename, buf.Bytes(), 0o600); err != nil {
+		if err := os.WriteFile(generatedFilename, buf.Bytes(), 0o600); err != nil {
 			genErrs = append(genErrs, err)
 		}
 
@@ -131,7 +130,7 @@ func main() {
 		return n1 <= n2
 	})
 	handleErr(json.NewEncoder(&buf).Encode(nodes))
-	handleErr(ioutil.WriteFile("nodes.json", buf.Bytes(), 0o600))
+	handleErr(os.WriteFile("nodes.json", buf.Bytes(), 0o600))
 
 	var graphLoader gfgo.NodeLoader
 	err = graphLoader.Load(
@@ -153,7 +152,7 @@ func main() {
 	err = goWriter.Flush()
 	handleErr(err)
 
-	err = ioutil.WriteFile(pgFilename, buf.Bytes(), 0o600)
+	err = os.WriteFile(pgFilename, buf.Bytes(), 0o600)
 	handleErr(err)
 }
 
diff --git a/gfutil/find.go b/gfutil/find.go
index b7197e6..7af2e49 100644
--- a/gfutil/find.go
+++ b/gfutil/find.go
@@ -1,13 +1,13 @@
 package gfutil
 
 import (
-	"io/ioutil"
+	"os"
 	"path"
 	"strings"
 )
 
 func FindGraphFileNames(dir string) ([]string, error) {
-	files, err := ioutil.ReadDir(dir)
+	files, err := os.ReadDir(dir)
 	if err != nil {
 		return nil, err
 	}
diff --git a/gfutil/gfgo/nodes.go b/gfutil/gfgo/nodes.go
index 0b62a94..5642973 100644
--- a/gfutil/gfgo/nodes.go
+++ b/gfutil/gfgo/nodes.go
@@ -406,7 +406,8 @@ func getDocFromPackage(pkg *packages.Package, pos token.Pos) string {
 
 // parseTypesDoc hacks the thing by grabbing info of types using doc.
 // TODO: review all this and improve if possible...
-//       shall we try with https://pkg.go.dev/go/ast?tab=doc#CommentGroup maybe?
+//
+//	shall we try with https://pkg.go.dev/go/ast?tab=doc#CommentGroup maybe?
 func parseTypesDoc(pkg *packages.Package) (map[string]string, error) {
 	if len(pkg.GoFiles) == 0 {
 		return nil, nil
diff --git a/gfutil/gfgo/testutil.go b/gfutil/gfgo/testutil.go
index 73ed652..3f8bebc 100644
--- a/gfutil/gfgo/testutil.go
+++ b/gfutil/gfgo/testutil.go
@@ -2,7 +2,6 @@ package gfgo
 
 import (
 	"bytes"
-	"io/ioutil"
 	"os"
 	"os/exec"
 	"path"
@@ -81,7 +80,7 @@ func TestGenerate(t *testing.T, wrappers []goflow.GraphWrapper, filename string,
 	} else if err != nil {
 		require.NoError(err)
 	}
-	err = ioutil.WriteFile(goFilename, buf.Bytes(), 0o600)
+	err = os.WriteFile(goFilename, buf.Bytes(), 0o600)
 	require.NoError(err)
 
 	mainFilename := path.Join("graph", "main.go")
@@ -117,7 +116,7 @@ func TestGenerate(t *testing.T, wrappers []goflow.GraphWrapper, filename string,
 	require.NoError(w.Flush())
 
 	require.NoError(err)
-	require.NoError(ioutil.WriteFile(mainFilename, buf.Bytes(), 0o600))
+	require.NoError(os.WriteFile(mainFilename, buf.Bytes(), 0o600))
 
 	cmd := exec.Command("go", "run", "./graph")
 	var out, errOut bytes.Buffer
diff --git a/run.go b/run.go
index d9d1c72..1eba8c7 100644
--- a/run.go
+++ b/run.go
@@ -2,7 +2,6 @@ package goflow
 
 import (
 	"fmt"
-	"io/ioutil"
 	"os"
 	"path"
 	"strings"
@@ -15,7 +14,7 @@ import (
 //
 // It also logs the time taken since start, because why not.
 func WriteFile(content, filename string, start time.Time) error {
-	before, err := ioutil.ReadFile(filename)
+	before, err := os.ReadFile(filename)
 	if err != nil && !os.IsNotExist(err) {
 		return err
 	}
@@ -46,7 +45,7 @@ func WriteFile(content, filename string, start time.Time) error {
 }
 
 func FindGraphFileNames(dir string) ([]string, error) {
-	files, err := ioutil.ReadDir(dir)
+	files, err := os.ReadDir(dir)
 	if err != nil {
 		return nil, err
 	}
diff --git a/wrapper.go b/wrapper.go
index d8eded4..a222f5a 100644
--- a/wrapper.go
+++ b/wrapper.go
@@ -8,6 +8,7 @@ package goflow
 //   - NodeWrapper
 //   - Linter
 //   - Checker
+//
 // goflow provides functions to use those simpler types as GraphWrappers.
 type GraphWrapper func(unmarshal func(interface{}) error, graph GraphRenderer) (GraphRenderer, error)
 
diff --git a/wrappers/bind/graph/bind.go b/wrappers/bind/graph/bind.go
index a74b10a..100786a 100644
--- a/wrappers/bind/graph/bind.go
+++ b/wrappers/bind/graph/bind.go
@@ -11,7 +11,6 @@ import (
 )
 
 /*
-
  */
 type Bind struct{}
 
@@ -24,7 +23,6 @@ func newBind(id string) Bind {
 }
 
 /*
-
  */
 func (g *Bind) Run() {
 
diff --git a/wrappers/constants/graph/constants.go b/wrappers/constants/graph/constants.go
index 365085b..de6dc18 100644
--- a/wrappers/constants/graph/constants.go
+++ b/wrappers/constants/graph/constants.go
@@ -12,7 +12,6 @@ import (
 )
 
 /*
-
  */
 type Constants struct{}
 
@@ -25,7 +24,6 @@ func newConstants(id string) Constants {
 }
 
 /*
-
  */
 func (g *Constants) Run() {
 
diff --git a/wrappers/ctx/graph/ctx.go b/wrappers/ctx/graph/ctx.go
index c70b1bf..582c187 100644
--- a/wrappers/ctx/graph/ctx.go
+++ b/wrappers/ctx/graph/ctx.go
@@ -12,7 +12,6 @@ import (
 )
 
 /*
-
  */
 type Ctx struct{}
 
@@ -25,7 +24,6 @@ func newCtx(id string) Ctx {
 }
 
 /*
-
  */
 func (g *Ctx) Run(ctx context.Context) {
 
diff --git a/wrappers/gonodes/graph/gonodes.go b/wrappers/gonodes/graph/gonodes.go
index 6a0ca57..819c18b 100644
--- a/wrappers/gonodes/graph/gonodes.go
+++ b/wrappers/gonodes/graph/gonodes.go
@@ -10,7 +10,6 @@ import (
 )
 
 /*
-
  */
 type GoNodes struct{ debug bool }
 
@@ -27,7 +26,6 @@ func newGoNodes(id string, debug bool) GoNodes {
 }
 
 /*
-
  */
 func (g *GoNodes) Run() {
 
diff --git a/wrappers/ifs/graph/ifs.go b/wrappers/ifs/graph/ifs.go
index 17301b5..2a6a2c6 100644
--- a/wrappers/ifs/graph/ifs.go
+++ b/wrappers/ifs/graph/ifs.go
@@ -11,7 +11,6 @@ import (
 )
 
 /*
-
  */
 type Ifs struct{}
 
@@ -24,7 +23,6 @@ func newIfs(id string) Ifs {
 }
 
 /*
-
  */
 func (g *Ifs) Run() {
 
diff --git a/wrappers/mockingjay/graph/mockingjay.go b/wrappers/mockingjay/graph/mockingjay.go
index 084854c..bf09830 100644
--- a/wrappers/mockingjay/graph/mockingjay.go
+++ b/wrappers/mockingjay/graph/mockingjay.go
@@ -13,7 +13,6 @@ import (
 )
 
 /*
-
  */
 type Mockingjay struct{}
 
@@ -26,7 +25,6 @@ func newMockingjay(id string) Mockingjay {
 }
 
 /*
-
  */
 func (g *Mockingjay) Run(ctx context.Context, a int, b int) (sum int) {
 
@@ -42,6 +40,9 @@ func (g *Mockingjay) Run(ctx context.Context, a int, b int) (sum int) {
 	// __output_sum_builder outputs
 	var __output_sum_builder_sum int
 
+	// __print_values outputs
+	var __print_values_aggregated []interface{}
+
 	// add outputs
 	var add_sum int
 
@@ -49,6 +50,8 @@ func (g *Mockingjay) Run(ctx context.Context, a int, b int) (sum int) {
 	var inputs_a int
 	var inputs_b int
 
+	// print outputs
+
 	igniteNodeID := "ignite"
 	doneNodeID := "done"
 
@@ -106,6 +109,18 @@ func (g *Mockingjay) Run(ctx context.Context, a int, b int) (sum int) {
 			},
 			alreadyDone: false,
 		},
+		"__print_values": {
+			deps: map[string]struct{}{
+				"add":        {},
+				igniteNodeID: {},
+			},
+			run: func() {
+				__print_values_aggregated = append(__print_values_aggregated, "sum")
+				__print_values_aggregated = append(__print_values_aggregated, add_sum)
+				done <- "__print_values"
+			},
+			alreadyDone: false,
+		},
 		"add": {
 			deps: map[string]struct{}{
 				"__ctx":      {},
@@ -159,6 +174,32 @@ func (g *Mockingjay) Run(ctx context.Context, a int, b int) (sum int) {
 			},
 			alreadyDone: false,
 		},
+		"print": {
+			deps: map[string]struct{}{
+				"__ctx":          {},
+				"__print_values": {},
+				igniteNodeID:     {},
+			},
+			run: func() {
+
+				var _mock []interface{}
+				if _mocks, ok := ctx.Value(mockingjay.ContextKey).(map[string][]interface{}); ok && _mocks != nil {
+					m, ok := _mocks["print"]
+					if ok {
+						_mock = m
+					}
+				}
+
+				if _mock != nil {
+
+				} else {
+					nodes.PrinterCtx(__ctx_ctx, __print_values_aggregated)
+				}
+
+				done <- "print"
+			},
+			alreadyDone: false,
+		},
 		igniteNodeID: {
 			deps: map[string]struct{}{},
 			run: func() {
@@ -172,8 +213,10 @@ func (g *Mockingjay) Run(ctx context.Context, a int, b int) (sum int) {
 				"__add_b":              {},
 				"__ctx":                {},
 				"__output_sum_builder": {},
+				"__print_values":       {},
 				"add":                  {},
 				"inputs":               {},
+				"print":                {},
 			},
 			run: func() {
 				done <- doneNodeID
diff --git a/wrappers/mockingjay/mockingjay.go b/wrappers/mockingjay/mockingjay.go
index 543d0ab..c2a3b04 100644
--- a/wrappers/mockingjay/mockingjay.go
+++ b/wrappers/mockingjay/mockingjay.go
@@ -31,8 +31,8 @@ func WithMock(ctx context.Context, nodeID string, values ...interface{}) context
 //
 // The WithMock helper function is provided to make it easier to mock  node:
 //
-//     ctx := mockingjay.WithMock(ctx, "myNode", 42)
-//     graph.Run(ctx, ...)
+//	ctx := mockingjay.WithMock(ctx, "myNode", 42)
+//	graph.Run(ctx, ...)
 func Mock(_ func(interface{}) error, node goflow.NodeRenderer) (goflow.NodeRenderer, error) {
 	return mocker{
 		NodeRenderer: ctx.Injector{
diff --git a/wrappers/mockingjay/mockingjay.yml b/wrappers/mockingjay/mockingjay.yml
index e765583..b8ad588 100644
--- a/wrappers/mockingjay/mockingjay.yml
+++ b/wrappers/mockingjay/mockingjay.yml
@@ -11,5 +11,12 @@ nodes:
       a: inputs.a
       b: inputs.b
 
+  - id: print
+    type: nodes.PrinterCtx
+    bind:
+      values:
+        - '"sum"'
+        - add.sum
+
 outputs:
   sum: add.sum
diff --git a/wrappers/outputs/graph/outputs.go b/wrappers/outputs/graph/outputs.go
index 48f620a..b825804 100644
--- a/wrappers/outputs/graph/outputs.go
+++ b/wrappers/outputs/graph/outputs.go
@@ -10,7 +10,6 @@ import (
 )
 
 /*
-
  */
 type Ouputs struct{}
 
@@ -23,7 +22,6 @@ func newOuputs(id string) Ouputs {
 }
 
 /*
-
  */
 func (g *Ouputs) Run() (random_int int, random_ints []int) {