code: def decl(self, *, func_ptr_cast: bool = False) -> str:
      mb_default = ""
      if self.default is not None:
          mb_default = f"={self.default}"
  
      # casting only needs to know the type
      if func_ptr_cast:
          return f"{self.type}"
      else:
          return f"{self.type} {self.name}{mb_default}"
  
imports: from abc import ABC, abstractmethod
  from dataclasses import dataclass
  from enum import auto, Enum
  from typing import List, Optional, Union
  from torchgen.model import Argument, SelfArgument, TensorOptionsArguments
label_desc: Use image node_id 4 for calling the Binding obj's underlying member method code with example usage: obj.decl() and returns: self, self, str, self, mb_default