+ /**
+ * Returns {@link NodeWithValue} which identifies this leaf set entry.
+ *
+ * Returned {@link NodeWithValue} contains same value as this node.
+ *
+ * <h3>Implementation notes</h3> Invocation of
+ * {@link NodeWithValue#getValue()} on returned instance of
+ * {@link NodeWithValue} must returns
+ * same value as invocation of {@link #getValue()}, such as
+ * following condition is allways met:
+ * <code>true == this.getIdentifier().getValue().equals(this.getValue())</code>
+ *
+ *
+ * @return {@link NodeWithValue} which identifies this leaf set entry.
+ */