code: def sample(self, key):
      return self.mean + self.std * jax.random.normal(
          key, self.mean.shape
      )
  
imports: import math
  from functools import partial
  from typing import Tuple
  import flax
  import flax.linen
  import jax
  import jax.numpy
  from flax.core.frozen_dict import FrozenDict
  from ..configuration_utils import ConfigMixin, flax_register_to_config
  from ..utils import BaseOutput
  from .modeling_flax_utils import FlaxModelMixin
label_desc: Use image node_id 2 for calling the FlaxDiagonalGaussianDistribution obj's underlying member method code with example usage: obj.sample(key) and returns: unknown