code: def sharding_hook(
      node: variables.Variable[tp.Any],
      value: tp.Any,
      /,
  ) -> tp.Any:
      if _global_mesh_defined() or (
          isinstance(node, Partitioned) and node.mesh is not None
      ):
          spec = get_partition_spec(node).value
          return with_sharding_constraint(value, spec, mesh=node.mesh)
      return value
  
imports: import functools
  import typing
  import jax
  from jax.experimental import maps
  from jax.sharding import Mesh, PartitionSpec
  from flax.experimental.nnx.nnx import variables
  from flax.experimental.nnx.nnx.pytreelib import TreeNode
  from flax.experimental.nnx.nnx.state import State
label_desc: Use image node_id 10 for calling a global function with example usage: sharding_hook() and returns: value, with_sharding_constraint