flow or inherent flaw?

src/Flow.php

@@ -0,0 +1,35 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Dakujem\Toru;
+
+/**
+ * Flow
+ *
+ * @author Andrej Rypak <xrypak@gmail.com>
+ */
+final class Flow
+{
+    public function __construct(
+        private readonly mixed $current,
+    ) {
+    }
+
+    public static function with(mixed $current): self
+    {
+        return new self($current);
+    }
+
+    public function do(callable $fn): self
+    {
+        return new self(
+            $fn($this->current),
+        );
+    }
+
+    public function result(): mixed
+    {
+        return $this->current;
+    }
+}