code: def get_placeholders(graph):
      return list(filter(lambda x: x.op == "placeholder", graph.nodes))
  
file_path: pytorch/torch/_functorch/compile_utils.py
imports: import torch
  import torch.fx
  from torch.utils._pytree import tree_flatten
  from torch.utils import _pytree
label_desc: Use image node_id 4 for calling a global function with example usage: get_placeholders(graph) and returns: list