class_docstr: Check the construction of MaskInfo from Mask.
class_docstr_tok: ["Check","the","construction","of","MaskInfo","from","Mask","."]
code: def _expected_full_mask_next(self):
      return np.array(
          [
              [-1, -1, -1, -1],
              [-1, -1, -1, -1],
              [-1, -1, -1, -1],
              [-1, -1, -1, -1],
          ],
          dtype=np.int8,
      )
  
imports: from __future__ import annotations
  from typing import List
  from absl.testing import absltest
  from absl.testing import parameterized
  import jax
  from jax.experimental.pallas.ops.tpu.splash_attention import splash_attention_mask
  from jax.experimental.pallas.ops.tpu.splash_attention import splash_attention_mask_info
  from jax._src import test_util
  import numpy
label_desc: Use image node_id 3 for calling the SplashAttentionMaskInfoTest obj's underlying member method code with example usage: obj._expected_full_mask_next() and returns: np