code: def add_node_configuration(self, param_name, node_id, param_value):
          
          if param_name not in self.config['nodes']:
              self.config['nodes'][param_name] = {node_id: param_value}
          else:
              self.config['nodes'][param_name][node_id] = param_value
docs: Set a parameter for a given node
  
          :param param_name: parameter identifier (as specified by the chosen model)
          :param node_id: node identifier
          :param param_value: parameter value