EasyAdmin 3 create custom field

  autocomplete, easyadmin, forms, symfony-forms, symfony4

I’d like to create custom autocomplete field with externe api call.
I’m using doc Create custom fields

But my template is not used.

public static function new(string $propertyName, ?string $label = null): self
    return (new self())
        // this template is used in 'index' and 'detail' pages
        // this is used in 'edit' and 'new' pages to edit the field contents
        // you can use your own form types too
        // these methods allow to define the web assets loaded when the
        // field is displayed in any CRUD page (index/detail/edit/new)

I’ve no error.
I create template in : /templates/admin/field

Anyone has an idea ?

Source: Symfony4 Questions