Draft: Basic implementation of plugin initializer

Signed-off-by: Bart Jaskulski bjaskulski@protonmail.com

src/DependencyInjection/ContainerBuilder.php

+<?php
+declare( strict_types=1 );
+
+namespace WPDesk\Init\DependencyInjection;
+
+use DI\Container;
+use DI\ContainerBuilder as DiBuilder;
+use DI\Definition\Source\DefinitionSource;
+
+final class ContainerBuilder {
+
+	/** @var DiBuilder */
+	private $original_builder;
+
+	public function __construct( DiBuilder $original_builder ) {
+		$this->original_builder = $original_builder;
+	}
+
+	/**
+	 * Add definitions to the container.
+	 *
+	 * @param string|array|DefinitionSource ...$definitions
+	 *  Can be an array of definitions, the name of a file containing definitions or
+	 *  a DefinitionSource object.
+	 *
+	 * @return $this
+	 */
+	public function add_definitions( ...$definitions ): self {
+		$this->original_builder->addDefinitions( ...$definitions );
+
+		return $this;
+	}
+
+	public function build(): Container {
+		return $this->original_builder->build();
+	}
+}