--- a/net/minecraft/server/JsonList.java
+++ b/net/minecraft/server/JsonList.java
@@ -56,7 +56,7 @@
         this.c = file;
         GsonBuilder gsonbuilder = (new GsonBuilder()).setPrettyPrinting();
 
-        gsonbuilder.registerTypeHierarchyAdapter(JsonListEntry.class, new JsonList.JsonListEntrySerializer(null));
+        gsonbuilder.registerTypeHierarchyAdapter(JsonListEntry.class, new JsonList.JsonListEntrySerializer()); // CraftBukkit - decompile error
         this.b = gsonbuilder.create();
     }
 
@@ -86,7 +86,7 @@
     @Nullable
     public V get(K k0) {
         this.h();
-        return (JsonListEntry) this.d.get(this.a(k0));
+        return (V) this.d.get(this.a(k0)); // CraftBukkit - fix decompile error
     }
 
     public void remove(K k0) {
@@ -108,6 +108,12 @@
         return (String[]) this.d.keySet().toArray(new String[this.d.size()]);
     }
 
+    // CraftBukkit start
+    public Collection<V> getValues() {
+        return this.d.values();
+    }
+    // CraftBukkit end
+
     public boolean isEmpty() {
         return this.d.size() < 1;
     }
@@ -137,7 +143,7 @@
         while (iterator.hasNext()) {
             Object object = iterator.next();
 
-            this.d.remove(this.a(object));
+            this.d.remove(this.a((K) object)); // CraftBukkit - decompile error
         }
 
     }
@@ -180,7 +186,7 @@
                         JsonListEntry jsonlistentry = (JsonListEntry) iterator.next();
 
                         if (jsonlistentry.getKey() != null) {
-                            this.d.put(this.a(jsonlistentry.getKey()), jsonlistentry);
+                            this.d.put(this.a((K) jsonlistentry.getKey()), (V) jsonlistentry); // CraftBukkit - fix decompile error
                         }
                     }
                 }