+/**
+ * Reader for reading YANG subtrees based on their path.
+ *
+ * Reader is requested to return object at specified path and all it's subnodes
+ * known to the reader or null if node is not found in this reader.
+ *
+ * @param <P> Path Type
+ * @param <D> Data Type
+ */
+public interface DataReader<P extends Path<P> ,D> {