code: def test_functional(self):
      # Functional API for NNX Modules
      functional = nnx.compatibility.functional(nnx.Linear)(32, 64)
      state = functional.init(rngs=nnx.Rngs(0))
      x = jax.numpy.ones((1, 32))
      y, updates = functional.apply(state)(x)
  
imports: import jax
  from flax import linen
  from flax.experimental import nnx
label_desc: Use image node_id 1 for calling the TestCompatibility obj's underlying member method code with example usage: obj.test_functional() without return types