make DefaultedRegistryValue generic

Author: MrHell228

src/main/java/org/spongepowered/api/registry/DefaultedRegistryValue.java

@@ -34,17 +34,17 @@
  * within a {@link DefaultedRegistryType defaulted registry}.
  */
 @SuppressWarnings("unchecked")
-public interface DefaultedRegistryValue {
+public interface DefaultedRegistryValue<T extends DefaultedRegistryValue<T>> {
 
-    default <T> ResourceKey key(final DefaultedRegistryType<T> type) {
+    default ResourceKey key(final DefaultedRegistryType<T> type) {
         return Objects.requireNonNull(type, "type").get().valueKey((T) this);
     }
 
-    default <T> Optional<ResourceKey> findKey(final DefaultedRegistryType<T> type) {
+    default Optional<ResourceKey> findKey(final DefaultedRegistryType<T> type) {
         return Objects.requireNonNull(type, "type").find().flatMap(r -> r.findValueKey((T) this));
     }
 
-    default <T> DefaultedRegistryReference<T> asDefaultedReference(final DefaultedRegistryType<T> type) {
+    default DefaultedRegistryReference<T> asDefaultedReference(final DefaultedRegistryType<T> type) {
         return RegistryKey.of(Objects.requireNonNull(type, "type"), this.key(type)).asDefaultedReference(type.defaultHolder());
     }
 }

src/main/java/org/spongepowered/api/tag/Taggable.java

@@ -33,7 +33,7 @@
 /**
  * A type that may be included in one or more {@link Tag} collections.
  */
-public interface Taggable<T extends Taggable<T>> extends DefaultedRegistryValue {
+public interface Taggable<T extends Taggable<T>> extends DefaultedRegistryValue<T> {
 
     /**
      * Gets the {@link RegistryType} that holds the types of {@link Tag tags}