<?php namespace Elementor\Modules\AtomicWidgets\PropsResolver; use Elementor\Core\Utils\Collection; use Elementor\Utils; if ( ! defined( 'ABSPATH' ) ) { exit; // Exit if accessed directly. } class Transformers_Registry extends Collection { public function register( string $key, Transformer_Base $transformer ): self { if ( isset( $this->items[ $key ] ) ) { Utils::safe_throw( "{$key} transformer is already registered." ); return $this; } $this->items[ $key ] = $transformer; return $this; } }