+ final Class<?> expectedResponseClass, final boolean propagateException) {
+ return voidOperation(operationName, message, expectedResponseClass, propagateException,
+ OperationCallback.NO_OP_CALLBACK);
+ }
+
+ private ListenableFuture<Void> voidOperation(final String operationName, final Object message,
+ final Class<?> expectedResponseClass, final boolean propagateException, final OperationCallback callback) {