formatting and method name change

src/Illuminate/Foundation/PackageManifest.php

@@ -59,36 +59,36 @@ public function __construct(Filesystem $files, $basePath, $manifestPath)
     }
 
     /**
-     * Get all of the $name values for all packages.
+     * Get all of the service provider class names for all packages.
      *
-     * @param  string  $name
      * @return array
      */
-    public function getRegisteredExtra($name)
+    public function providers()
     {
-        return collect($this->getManifest())->flatMap(function ($configuration) use ($name) {
-            return (array) ($configuration[$name] ?? []);
-        })->filter()->all();
+        return $this->config('providers');
     }
 
     /**
-     * Get all of the service provider class names for all packages.
+     * Get all of the aliases for all packages.
      *
      * @return array
      */
-    public function providers()
+    public function aliases()
     {
-        return $this->getRegisteredExtra('providers');
+        return $this->config('aliases');
     }
 
     /**
-     * Get all of the aliases for all packages.
+     * Get all of the values for all packages for the given configuration name.
      *
+     * @param  string  $key
      * @return array
      */
-    public function aliases()
+    public function config($key)
     {
-        return $this->getRegisteredExtra('aliases');
+        return collect($this->getManifest())->flatMap(function ($configuration) use ($key) {
+            return (array) ($configuration[$key] ?? []);
+        })->filter()->all();
     }
 
     /**