code: public List<Session> getSessionsForNode(final String node, final RequestOptions requestOptions) {
  
          return getSessionsForNode(node, null, requestOptions);
      }
docs: This endpoint is hit with a GET and returns the active sessions for a given node and datacenter.
  By default, the datacenter of the agent is queried; however,
  the dc can be provided using the "?dc=" query parameter.
  The node being queried must be provided on the path.
  /v1/session/node/node:
  Lists sessions belonging to a node
  
  @param node           node
  @param requestOptions request options for consistency and long poll
  @return list of sessions for this node