Renaming of classes, making true recursive structure

app/Support/Search/QueryParser/NodeGroup.php

@@ -0,0 +1,40 @@
+<?php
+
+declare(strict_types=1);
+
+namespace FireflyIII\Support\Search\QueryParser;
+
+/**
+ * Represents a group of nodes.
+ *
+ * NodeGroups can be nested inside other NodeGroups, making them subqueries
+ */
+class NodeGroup extends Node
+{
+    /** @var Node[] */
+    private array $nodes;
+
+    /**
+     * @param Node[] $nodes
+     * @param bool $prohibited
+     */
+    public function __construct(array $nodes, bool $prohibited = false)
+    {
+        $this->nodes = $nodes;
+        $this->prohibited = $prohibited;
+    }
+
+    /**
+     * @return Node[]
+     */
+    public function getNodes(): array
+    {
+        return $this->nodes;
+    }
+
+
+    public function __toString(): string
+    {
+        return ($this->prohibited ? '-' : '') . '[' . implode(' ', array_map(fn($node) => (string)$node, $this->nodes)) . ']';
+    }
+}