code: def _define_ref(
      self,
      name: str,
      load: t.Optional[t.Tuple[str, t.Optional[str]]] = None,
  ) -> str:
      ident = f"l_{self.level}_{name}"
      self.refs[name] = ident
      if load is not None:
          self.loads[ident] = load
      return ident
  
imports: import typing
  from .None import nodes
  from .visitor import NodeVisitor
label_desc: Use image node_id 3 for calling the Symbols obj's underlying member method code with example usage: obj._define_ref(name, load) and returns: ident