etc

salida.txt

% go run x.go
{0xc420080000}
&[{hello}]
someFunction receives &[{hello}]

x.go

package main

import (
	"fmt"
)

type RootStruct struct {
	Messages *[]Messaging
}

type Messaging struct {
	Text string
}

func main() {
	rootStruct := RootStruct{}

	messages := make([]Messaging, 0)
	rootStruct.Messages = &messages

	item := Messaging{Text: "hello"}

	messages = append(messages, item)

	fmt.Println(rootStruct)
	fmt.Println(rootStruct.Messages)

	someFunction(rootStruct.Messages)
}

func someFunction(arr *[]Messaging) {
	fmt.Println("someFunction receives", arr)
}