code: def _create(cls, name, node_type, nodeid=1,
                  loopback_ndi=None):
          
          loopback = loopback_ndi if loopback_ndi else []
          node = {node_type: {
              'activate_test': True,
              'disabled': False,
              'loopback_node_dedicated_interface': loopback,
              'name': name + ' node ' + str(nodeid),
              'nodeid': nodeid}
          }
          return node
docs: Create the node/s for the engine. This isn't called directly,
          instead it is used when engine.create() is called
  
          :param str name: name of node
          :param str node_type: based on engine type specified
          :param int nodeid: used to identify which node
          :param list LoopbackInterface loopback_ndi: optional loopback
              interface for node.