code: def is_top(graph: Graph, node: Node):
      return node in get_top(graph)
  
file_path: colossalai/colossalai/fx/passes/utils.py
imports: from typing import Dict
  import torch
  from torch.fx.graph import Graph
  from torch.fx.node import Node, map_arg
label_desc: Use image node_id 5 for calling a global function with example usage: is_top(graph, node) and returns: unknown