code: def _with_sharding_constraint_one_fallback(
      axis_resources: LogicalPartitionSpec,
      x: Array,
      fallback: RulesFallback = RulesFallback.AXIS_IS_UNSHARDED,
      rules: Optional[LogicalRules] = None,
      mesh: Optional[jax.sharding.Mesh] = None,
  ):
      """Either imposes a sharding constraint or applies fallback."""
      mesh_axes = _logical_to_mesh_axes(axis_resources, rules)
      if mesh_axes is None:
          return _with_sharding_constraint(x, None, mesh=mesh)
  
      if fallback == RulesFallback.AXIS_IS_UNSHARDED:
          mesh_axes = [
              None if x is _unassigned_axis else x for x in mesh_axes
          ]
      else:
          if any(x is _unassigned_axis for x in mesh_axes):
              if fallback == RulesFallback.RAISE_ERROR:
                  raise ValueError(
                      f"Axis names {axis_resources} did not match a rule"
                  )
              else:
                  return x
      return _with_sharding_constraint(
          x, jax.sharding.PartitionSpec(*mesh_axes), mesh=mesh
      )
  
imports: import collections
  import contextlib
  import dataclasses
  import enum
  import functools
  import threading
  from typing import Any, Callable, List, Optional, Sequence, Tuple, Union
  import jax
  from jax import lax
  from jax.experimental import maps
  from flax import struct
  from flax.core import meta
label_desc: Use image node_id 11 for calling a global function with example usage: _with_sharding_constraint_one_fallback(axis_resources, x, fallback, rules, mesh) and returns: _with_sharding_constraint, _with_sharding_constraint, x