Se actualizan los métodos.

Services/StatsD.php

@@ -67,7 +67,7 @@ class StatsD
      * 
      * @return boolean
      */
-    public static function increment($stats, $sampleRate = 1)
+    public function increment($stats, $sampleRate = 1)
     {
         return $this->updateStats($stats, 1, $sampleRate, 'c');
     }
@@ -80,7 +80,7 @@ class StatsD
      * 
      * @return boolean
      */
-    public static function decrement($stats, $sampleRate = 1)
+    public function decrement($stats, $sampleRate = 1)
     {
         $this->updateStats($stats, -1, $sampleRate, 'c');
     }
@@ -95,7 +95,7 @@ class StatsD
      * 
      * @return boolean
      */
-    public static function updateStats($stats, $delta = 1, $sampleRate = 1, $metric = 'c')
+    public function updateStats($stats, $delta = 1, $sampleRate = 1, $metric = 'c')
     {
         if (!is_array($stats)) {
             $stats = array($stats);