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What is the correct syntax for a theme suggestion using field ID and node ID?

I’m struggling with the php syntax to create a theme suggestion for form elements that uses both the field ID and the node ID.

I’m trying to achieve this theme suggestion: form-element--first-name--23.html.twig

Here’s the function I’m playing with, based on some info from this article.

function mytheme_theme_suggestions_form_element_alter(array &$suggestions, array $variables, $hook) {     $object = $variables['element']['#object'];     $id = str_replace("-", "_", $variables['element']['#id']);     if (get_class($object) == 'DrupalnodeEntityNode') {        $suggestions[] = $hook . '__' . $id . '__' . $node->id();     } }
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What is the correct syntax for a theme suggestion using field ID and node ID?

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