Remove some ties

src/package/Contracts/Config.php

@@ -5,10 +5,53 @@
 interface Config
 {
     /**
-     * Get a configu key.
+     * Determine if the given configuration value exists.
      *
-     * @param $key
+     * @param  string  $key
+     * @return bool
+     */
+    public function has($key);
+
+    /**
+     * Get the specified configuration value.
+     *
+     * @param  array|string  $key
+     * @param  mixed   $default
      * @return mixed
      */
-    public function get($key);
+    public function get($key, $default = null);
+
+    /**
+     * Get all of the configuration items for the application.
+     *
+     * @return array
+     */
+    public function all();
+
+    /**
+     * Set a given configuration value.
+     *
+     * @param  array|string  $key
+     * @param  mixed   $value
+     * @return void
+     */
+    public function set($key, $value = null);
+
+    /**
+     * Prepend a value onto an array configuration value.
+     *
+     * @param  string  $key
+     * @param  mixed  $value
+     * @return void
+     */
+    public function prepend($key, $value);
+
+    /**
+     * Push a value onto an array configuration value.
+     *
+     * @param  string  $key
+     * @param  mixed  $value
+     * @return void
+     */
+    public function push($key, $value);
 }

src/package/Services/Config.php

@@ -4,7 +4,7 @@
 
 use PragmaRX\Countries\Package\Contracts\Config as ConfigContract;
 
-class Config implements ConfigContract
+class Config
 {
     /**
      * Configuration.