code: public String getMemberValue(String name) {
          if (m_childNodeMap == null) {
              return null;
          }
          UNode childNode = m_childNodeMap.get(name);
          return childNode != null && childNode.isValue() ? childNode.getValue() : null;
      }
docs: Get the value of the child VALUE node (member) of this UNode with the given name.
  If this is not a MAP, has no children, there is no child node with the given name,
  or the child node isn't a VALUE node, then null is returned.
  
  @param name  Candidate name of a child member node.
  @return      Value of child VALUE UNode with the given name, if any, otherwise null.