code: def test_dtype_infer(self):
      rng = random.key(0)
      x = jnp.ones((4, 6, 5), jnp.complex64)
      sa_module = nn.MultiHeadDotProductAttention(
          num_heads=8,
          qkv_features=16,
          kernel_init=initializers.ones,
          bias_init=initializers.zeros,
          deterministic=False,
      )
      y, _ = sa_module.init_with_output(rng, x)
      self.assertEqual(y.shape, x.shape)
      self.assertEqual(y.dtype, jnp.complex64)
  
imports: import jax
  import jax.numpy
  import numpy
  from absl.testing import absltest, parameterized
  from jax import lax, random
  from jax.nn import initializers
  from flax import errors, jax_utils
  from flax import linen
  from flax.core import pop
label_desc: Use image node_id 2 for calling the AttentionTest obj's underlying member method code with example usage: obj.test_dtype_infer() without return types