You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: testsuite_native_test.go
    path of file: ./repos/vecty
    
    the code of the file until where you have to start completion: // +build !js

package vecty

import (
	"fmt"
	"os/exec"
	"reflect"
)

func commandOutput(command string, args ...string) (string, error) {
	cmd := exec.Command(command, args...)
	out, _ := cmd.CombinedOutput()
	return string(out), nil
}

func init() {
	htmlNodeImpl = func(h *HTML) SyscallJSValue {
		if h.node == nil {
			panic("vecty: cannot call (*HTML).Node() before DOM node creation / component mount")
		}
		retur
    
func init() {
	htmlNodeImpl = func(h *HTML) SyscallJSValue {
		if h.node == nil {
			panic("vecty: cannot call (*HTML).Node() before DOM node creation / component mount")
		}
		return h.node.(wrappedObject).j
	}
	funcOfImpl = func(fn func(this jsObject, args []jsObject) interface{}) jsFunc {
		return &jsFuncImpl{
			goFunc: fn,
		}
	}
	valueOfImpl = func(v interface{}) jsObject {
		ts := global().(*objectRecorder).ts
		name := fmt.Sprintf("valueOf(%v)", v)
		r := &objectRecorder{ts: ts, name: name}
		switch reflect.ValueOf(v).Kind() {
		case reflect.String:
			ts.strings.mock(name, v)
		case reflect.Bool:
			ts.bools.mock(name, v)
		case reflect.Float32, reflect.Float64:
			ts.floats.mock(name, v)
		case reflect.Int:
			ts.ints.mock(name, v)
		default:
		}
		return r
	}
}