Making a widget using multiple widgets

I am trying to make a file choosing widget (which I need on almost every development I am tasked with). The widget is composed of a label, an entry and a button (in that order) and it all appears horizontally on the same line.
I wish to avoid (if possible) making a brand new custom widget as 100% of the functionnality already exists in the sandard fyne widgets. So my idea was to make a custom layout and place my widgets in there.
The problem is that as my constructor function is returning a fyne.Container, I do not have access to the Entry.Text field which I need access to.
I could of course do container.Objects[1].(widgets.Entry).Text every time I need to access it but that just seems unintuitive.
So then I thought that I would extend the fyne.Container to return the Text to me through a method however it seems container doesn't have something similar to ExtendBaseWidget() to get all the functionnality of a container.
Here is the working code I have so far:

package fyne_custom
import (
"os"
"fyne.io/fyne/v2"
"fyne.io/fyne/v2/container"
"fyne.io/fyne/v2/widget"
"github.com/sqweek/dialog"
)
type FileChoiceLayout struct {
Label, Entry, Button fyne.CanvasObject
}
func (f FileChoiceLayout) MinSize(_ []fyne.CanvasObject) fyne.Size {
total := fyne.NewSize(0, 0)
total = total.Add(f.Label.MinSize())
total = total.Add(f.Entry.MinSize())
total = total.Add(f.Button.MinSize())
return total
}
func (f FileChoiceLayout) Layout(items []fyne.CanvasObject, size fyne.Size) {
topLeft := fyne.NewPos(0, 0)
for _, item := range items {
if item == f.Label {
item.Move(topLeft)
item.Resize(item.MinSize())
topLeft = topLeft.Add(fyne.NewPos(item.MinSize().Width, 0))
} else if item == f.Entry {
item.Move(topLeft)
width := size.Width - f.Label.MinSize().Width - f.Button.MinSize().Width
item.Resize(fyne.NewSize(width, item.MinSize().Height))
topLeft = topLeft.Add(fyne.NewPos(width, 0))
} else if item == f.Button {
item.Move(topLeft)
item.Resize(item.MinSize())
}
}
}
func NewFileChoice(labelText, placeHolder, buttonText string) (*fyne.Container, *widget.Entry) {
label := widget.NewLabel(labelText)
entry := widget.NewEntry()
entry.PlaceHolder = placeHolder
button := widget.NewButton(buttonText, func() {
cwd, _ := os.Getwd()
file, err := dialog.File().Load()
if err != nil {
file = ""
}
if file != "" {
entry.SetText(file)
}
os.Chdir(cwd)
})
container := container.New(&FileChoiceLayout{Label: label, Entry: entry, Button: button}, label, entry, button)
return container, entry
}

The temporary workaround I found so far is to return not only the container but also the entry widget to access its Text Field.
I'm thinking there must be a better way to do it but I can't seem to find it.
Any idea would be very much appreciated!

I ended up making the custom widget.
It wasn't that much more code in the end and it works as I intended it. The only thing is that I'm not sure I did it correctly. My Destroy() and Update() methods are empty. I'm not sure if that's how it should be. And I had to use a bind string to get the data to sync between the widget struct and its renderer.
If anyone who knows better has an opinion, I am entirely open to it!
In any case, here is the code if anyone needs this widget:

package fyne_custom
import (
"os"
"fyne.io/fyne/v2"
"fyne.io/fyne/v2/data/binding"
"fyne.io/fyne/v2/widget"
"github.com/sqweek/dialog"
)
type FileChoice struct {
widget.BaseWidget
path                               binding.String
labelText, placeHolder, buttonText string
}
func (fc FileChoice) Text() string {
text, _ := fc.path.Get()
return text
}
func NewFileChoice(labelText, placeHolder, buttonText string) *FileChoice {
f := &FileChoice{}
f.path = binding.NewString()
f.labelText = labelText
f.placeHolder = placeHolder
f.buttonText = buttonText
f.ExtendBaseWidget(f)
return f
}
type fileChoiceRender struct {
fc     *FileChoice
label  *widget.Label
entry  *widget.Entry
button *widget.Button
}
func (fcr fileChoiceRender) Objects() []fyne.CanvasObject {
return []fyne.CanvasObject{fcr.label, fcr.entry, fcr.button}
}
func (fcr fileChoiceRender) MinSize() fyne.Size {
var minHeight float32
var totalWidth float32
for _, item := range fcr.Objects() {
if item.MinSize().Height > minHeight {
minHeight = item.MinSize().Height
}
totalWidth += item.MinSize().Width
}
return fyne.NewSize(totalWidth, minHeight)
}
func (fcr fileChoiceRender) Layout(size fyne.Size) {
topLeft := fyne.NewPos(0, 0)
fcr.label.Move(topLeft)
fcr.label.Resize(fyne.NewSize(fcr.label.MinSize().Width, size.Height))
topLeft = topLeft.Add(fyne.NewPos(fcr.label.MinSize().Width, 0))
fcr.entry.Move(topLeft)
fcr.entry.Resize(fyne.NewSize(size.Width-fcr.label.MinSize().Width-fcr.button.MinSize().Width, size.Height))
topLeft = topLeft.Add(fyne.NewPos(size.Width-fcr.label.MinSize().Width-fcr.button.MinSize().Width, 0))
fcr.button.Move(topLeft)
fcr.button.Resize(fyne.NewSize(fcr.button.MinSize().Width, size.Height))
}
func (fcr fileChoiceRender) Destroy() {}
func (fcr fileChoiceRender) Refresh() {}
func (fc FileChoice) CreateRenderer() fyne.WidgetRenderer {
label := widget.NewLabel(fc.labelText)
entry := widget.NewEntryWithData(fc.path)
entry.PlaceHolder = fc.placeHolder
button := widget.NewButton(fc.buttonText, func() {
cwd, _ := os.Getwd()
defer os.Chdir(cwd)
file, err := dialog.File().Load()
if err != nil {
file = ""
}
if file != "" {
entry.SetText(file)
}
})
return &fileChoiceRender{label: label, entry: entry, button: button}
}