code: public byte[] get(String fqn) {
          final Node n = findNode(fqn);
          if (n == null)
              return null;
          final byte[] buffer = n.getData();
          if (buffer == null)
              return null;
          return Arrays.copyOf(buffer, buffer.length);
      }
docs: Finds a node given its name and returns the data associated with it. Returns null if the node was not found in the tree or the data is null.
  
  @param fqn The fully qualified name of the node.
  @return The data associated with the node, or
  <code>null</code> if none or node is nonexistent.