statically reference the plugin and mark as experimental

Author: simonbasle

src/main/java/rx/exceptions/OnErrorThrowable.java

@@ -109,6 +109,9 @@ public static Throwable addValueAsLastCause(Throwable e, Object value) {
     public static class OnNextValue extends RuntimeException {
 
         private static final long serialVersionUID = -3454462756050397899L;
+
+        private static final RxJavaErrorHandler ERROR_HANDLER = RxJavaPlugins.getInstance().getErrorHandler();
+
         private final Object value;
 
         /**
@@ -161,7 +164,7 @@ private static String renderValue(Object value){
                 return ((Enum<?>) value).name();
             }
 
-            String pluggedRendering = RxJavaPlugins.getInstance().getErrorHandler().handleOnNextValueRendering(value);
+            String pluggedRendering = ERROR_HANDLER.handleOnNextValueRendering(value);
             if (pluggedRendering != null) {
                 return pluggedRendering;
             }

src/main/java/rx/plugins/RxJavaErrorHandler.java

@@ -17,6 +17,7 @@
 
 import rx.Observable;
 import rx.Subscriber;
+import rx.annotations.Experimental;
 import rx.exceptions.OnErrorThrowable;
 
 /**
@@ -62,6 +63,7 @@ public void handleError(Throwable e) {
      * @param item the last emitted item, that caused the exception wrapped in {@link OnErrorThrowable.OnNextValue}.
      * @return a short {@link String} representation of the item if one is known for its type, or null for default.
      */
+    @Experimental
     public final String handleOnNextValueRendering(Object item) {
         try {
             return render(item);
@@ -83,6 +85,7 @@ public final String handleOnNextValueRendering(Object item) {
      * @param item the last emitted item, that caused the exception wrapped in {@link OnErrorThrowable.OnNextValue}.
      * @return a short {@link String} representation of the item if one is known for its type, or null for default.
      */
+    @Experimental
     protected String render (Object item) {
         //do nothing by default
         return null;