code: def vec(self, sz: int):
      return self.base.vec(sz)
  
imports: from typing import Final, Optional, ClassVar, Set, Tuple, Dict
  from dataclasses import dataclass
  import numpy
  import functools
label_desc: Use image node_id 2 for calling the ImageDType obj's underlying member method code with example usage: obj.vec(sz) and returns: self