code: def _make_ssa_name(name):
      """
      Converts a symbol name (string) into an SSA name, by prepending '%'.
      Only used for pretty printing the graph.
      """
      if name is None:
          return "None"
      return "%" + name
  
imports: from collections import OrderedDict
  import torch
  from torch.fx.node import Node
  from coremltools import _logger
  from .edgeir_utils import extract_inputs_from_edge_program
  from .torchscript_utils import _expand_and_optimize_ir
label_desc: Use image node_id 1 for calling a global function with example usage: _make_ssa_name(name) and returns: unknown, str