Executable interface for operations

src/Operation/Executable.php

+<?php
+
+namespace MongoDB\Operation;
+
+use MongoDB\Driver\Server;
+
+/**
+ * Executable interface for operation classes.
+ *
+ * @api
+ */
+interface Executable
+{
+    /**
+     * Execute the operation.
+     *
+     * @param Server $server
+     * @return mixed
+     */
+    public function execute(Server $server);
+}