changes for filter and print

vendor/phpstan/phpdoc-parser/src/Printer/DiffElem.php

@@ -0,0 +1,44 @@
+<?php declare(strict_types = 1);
+
+namespace PHPStan\PhpDocParser\Printer;
+
+/**
+ * Inspired by https://github.com/nikic/PHP-Parser/tree/36a6dcd04e7b0285e8f0868f44bd4927802f7df1
+ *
+ * Copyright (c) 2011, Nikita Popov
+ * All rights reserved.
+ *
+ * Implements the Myers diff algorithm.
+ *
+ * @internal
+ */
+class DiffElem
+{
+
+	public const TYPE_KEEP = 0;
+	public const TYPE_REMOVE = 1;
+	public const TYPE_ADD = 2;
+	public const TYPE_REPLACE = 3;
+
+	/** @var self::TYPE_* */
+	public $type;
+
+	/** @var mixed Is null for add operations */
+	public $old;
+
+	/** @var mixed Is null for remove operations */
+	public $new;
+
+	/**
+	 * @param self::TYPE_* $type
+	 * @param mixed $old Is null for add operations
+	 * @param mixed $new Is null for remove operations
+	 */
+	public function __construct(int $type, $old, $new)
+	{
+		$this->type = $type;
+		$this->old = $old;
+		$this->new = $new;
+	}
+
+}