[11.x] Make MultipleInstanceManager driver field customizable (#51905)

* make MultipleInstanceManager driver field customizable

* formatting

---------

Co-authored-by: Taylor Otwell <taylor@laravel.com>

Author: princejohnsantillan

src/Illuminate/Support/MultipleInstanceManager.php

@@ -29,6 +29,13 @@ abstract class MultipleInstanceManager
      */
     protected $customCreators = [];
 
+    /**
+     * The key name of the "driver" equivalent configuration option.
+     *
+     * @var string
+     */
+    protected $driverKey = 'driver';
+
     /**
      * Create a new manager instance.
      *
@@ -104,19 +111,19 @@ protected function resolve($name)
             throw new InvalidArgumentException("Instance [{$name}] is not defined.");
         }
 
-        if (! array_key_exists('driver', $config)) {
-            throw new RuntimeException("Instance [{$name}] does not specify a driver.");
+        if (! array_key_exists($this->driverKey, $config)) {
+            throw new RuntimeException("Instance [{$name}] does not specify a {$this->driverKey}.");
         }
 
-        if (isset($this->customCreators[$config['driver']])) {
+        if (isset($this->customCreators[$config[$this->driverKey]])) {
             return $this->callCustomCreator($config);
         } else {
-            $driverMethod = 'create'.ucfirst($config['driver']).'Driver';
+            $createMethod = 'create'.ucfirst($config[$this->driverKey]).ucfirst($this->driverKey);
 
-            if (method_exists($this, $driverMethod)) {
-                return $this->{$driverMethod}($config);
+            if (method_exists($this, $createMethod)) {
+                return $this->{$createMethod}($config);
             } else {
-                throw new InvalidArgumentException("Instance driver [{$config['driver']}] is not supported.");
+                throw new InvalidArgumentException("Instance {$this->driverKey} [{$config[$this->driverKey]}] is not supported.");
             }
         }
     }
@@ -129,7 +136,7 @@ protected function resolve($name)
      */
     protected function callCustomCreator(array $config)
     {
-        return $this->customCreators[$config['driver']]($this->app, $config);
+        return $this->customCreators[$config[$this->driverKey]]($this->app, $config);
     }
 
     /**