import axiom without dependency on symfony console

axiom_src/Bags/BagInterface.php

@@ -0,0 +1,32 @@
+<?php
+
+namespace Enzyme\Axiom\Bags;
+
+interface BagInterface
+{
+    /**
+     * Get the value associated with the given key. If the key does not
+     * exist, return null instead.
+     *
+     * @param string $key
+     *
+     * @return mixed
+     */
+    public function get($key);
+
+    /**
+     * Get all the key/value pairs for this bag.
+     *
+     * @return array
+     */
+    public function getAll();
+
+    /**
+     * Check whether there is a value associated with the given key.
+     *
+     * @param string $key
+     *
+     * @return boolean
+     */
+    public function has($key);
+}