Merge branch 'ai-better-pw-damage' into 'master'

Better ranking system for damaging planeswalkers directly

See merge request core-developers/forge!414

forge-game/src/main/java/forge/game/cost/Cost.java

@@ -94,6 +94,15 @@ public class Cost implements Serializable {
         return true;
     }
 
+    public <T extends CostPart> T getCostPartByType(Class<T> costType) {
+        for (CostPart p : getCostParts()) {
+            if (costType.isInstance(p)) {
+                return (T)p;
+            }
+        }
+        return null;
+    }
+
     /**
      * Gets the cost parts.
      *