code: def _resolve_zeros_b(tangent, batch_axis):
      if type(tangent) is ad.Zero:
          return None
      else:
          return batch_axis
  
imports: import functools
  from typing import Any
  import jax
  import jax.core
  import jax.interpreters.ad
  import jax.interpreters.batching
  import jax.interpreters.mlir
  import jax.tree_util
  from jaxtyping import PyTree
  from .._filters import combine, is_array, is_array_like, partition
  from .._tree import tree_equal
label_desc: Use image node_id 20 for calling a global function with example usage: _resolve_zeros_b(tangent, batch_axis) and returns: None, batch_axis