class_docstr: Lazy full mask, allows all tokens to attend to all other tokens.
class_docstr_tok: ["Lazy","full","mask",",","allows","all","tokens","to","attend","to","all","other","tokens","."]
code: def __getitem__(self, idx) -> np.ndarray:
      if len(idx) != 2:
          raise NotImplementedError(f"Unsupported slice: {idx}")
      i, j = idx
      if not isinstance(i, slice) or not isinstance(j, slice):
          raise NotImplementedError(f"Unsupported slice: {idx}")
      i = _fill_slice(i, self.shape[0])
      j = _fill_slice(j, self.shape[1])
      return np.ones(
          (i.stop - i.start, j.stop - j.start), dtype=np.bool_
      )
  
imports: from __future__ import annotations
  import dataclasses
  from typing import Any, Callable, Sequence, Tuple
  import numpy
label_desc: Use image node_id 3 for calling the FullMask obj's underlying member method code with example usage: obj.__getitem__(idx) and returns: np