code: public boolean isSocketBinding(String socketBindingGroupName, String socketBindingName) throws Exception {
          Address addr = Address.root().add(SOCKET_BINDING_GROUP, socketBindingGroupName);
          String haystack = SOCKET_BINDING;
          return null != findNodeInList(addr, haystack, socketBindingName);
      }
docs: Checks to see if there is already a socket binding in the given group.
  
  @param socketBindingGroupName the name of the socket binding group in which to look for the named socket binding
  @param socketBindingName the name of the socket binding to look for
  @return true if there is an existing socket binding in the given group
  @throws Exception any error