docstr: find node's index
docstr_tok: ["find","node","'s","index"]
code: def find_node_idx(self, node: Node) -> int:
      """
      find node's index
      """
      return self._node_dict[node.name]
  
imports: from typing import Any, Dict, List, Union
  from torch.fx.node import Node
  from colossalai.logging import get_dist_logger
label_desc: Use image node_id 3 for calling the NodeMgr obj's underlying member method code with example usage: obj.find_node_idx(node) and returns: self