code: def _Batch(x, batch_axes):
      """Combine all but batch_axes last axes into batch to avoid shape problems."""
      if batch_axes is None:
          return x
      if isinstance(x, list) and not x:
          return []
      return tl.BatchLeadingAxes(x, n_last_axes_to_keep=batch_axes)
  
imports: from trax import layers
  from trax import models
  from trax.fastmath import numpy
label_desc: Use image node_id 1 for calling a global function with example usage: _Batch(x, batch_axes) and returns: tl, x, list