adding device specific counters for meter ids in
the meter service.

Change-Id: I38d38a0a85024927f5a74013b2b4d9efa9b32d22
diff --git a/core/api/src/main/java/org/onosproject/net/meter/MeterStore.java b/core/api/src/main/java/org/onosproject/net/meter/MeterStore.java
index 5112a4a..f429e95 100644
--- a/core/api/src/main/java/org/onosproject/net/meter/MeterStore.java
+++ b/core/api/src/main/java/org/onosproject/net/meter/MeterStore.java
@@ -57,12 +57,12 @@
     void updateMeterState(Meter meter);
 
     /**
-     * Obtains a meter matching the given meter id.
+     * Obtains a meter matching the given meter key.
      *
-     * @param meterId a meter id
+     * @param key a meter key
      * @return a meter
      */
-    Meter getMeter(MeterId meterId);
+    Meter getMeter(MeterKey key);
 
     /**
      * Returns all meters stored in the store.