}
	m4 := maps.Clone(m3)
	fmt.Println(m4["key"][0])
	m4["key"][0] = 100
	fmt.Println(m3["key"][0])
	fmt.Println(m4["key"][0])

	// Output:
	// 1
	// 100
	// 1
	// 100
	// 100
}

func ExampleCopy() {
	m1 := map[string]int{
		"one": 1,
		"two": 2,
	}
	m2 := map[string]int{
		"one": 10,
	}

	maps.Copy(m2, m1)
	fmt.Println("m2 is:", m2)

	m2["one"] = 100
	fmt.Println("m1 is:", m1)

// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

package io_test

import (
	"fmt"
	"io"
	"log"
	"os"
	"strings"
)

func ExampleCopy() {
	r := strings.NewReader("some io.Reader stream to be read\n")

	if _, err := io.Copy(os.Stdout, r); err != nil {
		log.Fatal(err)
	}

	// Output:
	// some io.Reader stream to be read
}